8 files changed, 263 insertions, 53 deletions
diff --git a/Master/texmf-dist/doc/latex/hep-title/bibliography.bib b/Master/texmf-dist/doc/latex/hep-title/bibliography.bib
index e5117be3d56..5b217a2aad6 100644
--- a/Master/texmf-dist/doc/latex/hep-title/bibliography.bib
+++ b/Master/texmf-dist/doc/latex/hep-title/bibliography.bib
@@ -21,7 +21,7 @@ subtitle = "An acronym extension for glossaries",
 author = "Jan Hajer",
 year = "2021",
 eprinttype = "ctan",
-eprint = "hep-acronyms",
+eprint = "hep-acronym",
 related = "hep-paper-1",
 }
 
@@ -95,6 +95,24 @@ eprint = "hep-title",
 related = "hep-paper-1",
 }
 
+@article{hep-reference,
+title = "The |hep-reference| package",
+subtitle = "Selection of reference improvements",
+author = "Jan Hajer",
+year = "2021",
+eprinttype = "ctan",
+eprint = "hep-reference",
+related = "hep-paper-1",
+}
+
+@article{hep-cv,
+title = "The |hep-cv| package",
+subtitle = "Appealing curricula vitarum",
+author = "Jan Hajer",
+year = "2020",
+related = "hep-paper-1",
+}
+
 @article{kvoptions,
 title = "The |kvoptions| package",
 subtitle = "Key value format for package options",
@@ -1053,3 +1071,144 @@ eprinttype = "ctan",
 eprint = "soulutf8",
 }
 
+@article{moderncv,
+title = "The |moderncv| package",
+subtitle = "A modern curriculum vitae class",
+author = "Xavier Danaux",
+year = "2006",
+eprinttype = "ctan",
+eprint = "moderncv",
+related = "moderncv-1",
+}
+
+@article{anyfontsize,
+title = "The |anyfontsize| package",
+subtitle = "Select any font size in \hologo{LaTeX}",
+author = "Péter Szabó",
+date = "2007",
+eprinttype = "ctan",
+eprint = "anyfontsize",
+}
+
+@article{array,
+title = "A new implementation of \hologo{LaTeX}’s |tabular| and |array| environment",
+subtitle = "Extending the |array| and |tabular| environments",
+author = "Frank Mittelbach, David Carlisle",
+collaboration= "\hologo{LaTeX} Team",
+year = "1993",
+eprinttype = "ctan",
+eprint = "array",
+}
+
+@article{dashrule,
+title = "The |dashrule| package",
+subtitle = "Draw dashed rules",
+author = "Scott Pakin",
+date = "2008",
+eprinttype = "ctan",
+eprint = "dashrule",
+}
+
+@article{fancyhdr,
+title = "The |fancyhdr| and |extramarks| packages",
+subtitle = "Extensive control of page headers and footers in \hologo{LaTeX2e}",
+author = "Piet van Oostrum",
+date = "1994",
+eprinttype = "ctan",
+eprint = "fancyhdr",
+}
+
+@article{lastpage,
+title = "The |lastpage| package",
+subtitle = "Reference last page for Page $N$ of $M$ type footers",
+author = "Hans-Martin Münch and Jeffrey Goldberg",
+date = "1994",
+eprinttype = "ctan",
+eprint = "lastpage",
+}
+
+@article{textpos,
+title = "|Textpos|: absolute positioning of text on the page",
+subtitle = "Place boxes at arbitrary positions on the \hologo{LaTeX} page",
+author = "Norman Gray",
+date = "1999",
+eprinttype = "ctan",
+eprint = "textpos",
+related = "textpos-1",
+}
+
+@manual{textpos-1,
+eprinttype = "bitbucket",
+eprintclass = "nxg",
+eprint = "textpos",
+}
+
+@article{subfiles,
+title = "The |subfiles| package: A Document Class and a Package for Handling Multi-File Projects",
+subtitle = "Individual typesetting of subfiles of a \enquote{main} document",
+author = "Federico Garcia and Gernot Salzer",
+date = "2002",
+eprinttype = "ctan",
+eprint = "subfiles",
+related = "subfiles-1",
+}
+
+@manual{subfiles-1,
+eprinttype = "github",
+eprintclass = "gsalzer",
+eprint = "subfiles",
+}
+
+@article{titlesec,
+title = "The |titlesec|, |titleps| and |titletoc| packages",
+subtitle = "Select alternative section titles",
+author = "Javier Bezos",
+year = "1998",
+eprinttype = "ctan",
+eprint = "titlesec",
+related = "titlesec-1",
+}
+
+@manual{titlesec-1,
+eprinttype = "github",
+eprintclass = "jbezos",
+eprint = "titlesec",
+}
+
+@article{calc,
+title = "The |calc| package",
+subtitle = "Simple arithmetic in \hologo{LaTeX} commands",
+author = "Kresten Krab Thorup and Frank Jensen",
+collaboration = "\hologo{LaTeX3} Project",
+year = "1992",
+eprinttype = "ctan",
+eprint = "calc",
+}
+
+@article{tabulary,
+title = "The |tabulary| package",
+subtitle = "Tabular with variable width columns balanced",
+author = "David Carlisle",
+year = "1995",
+eprinttype = "ctan",
+eprint = "tabulary",
+}
+
+@article{xcolor,
+title = "The |xcolor| package",
+subtitle = "Driver-independent color extensions for \hologo{LaTeX} and \hologo{pdfLaTeX}",
+author = "Uwe Kern",
+collaboration = "\hologo{LaTeX} Project",
+year = "2003",
+eprinttype = "ctan",
+eprint = "xcolor",
+}
+
+@article{overlays,
+title = "The |overlays| package",
+subtitle = "Incremental slides",
+author = "Andreas Nolda",
+year = "2016",
+eprinttype = "ctan",
+eprint = "overlays",
+}
diff --git a/Master/texmf-dist/doc/latex/hep-title/hep-title-documentation.pdf b/Master/texmf-dist/doc/latex/hep-title/hep-title-documentation.pdf
index 4c8f7922d4b..5efb25df630 100644
--- a/Master/texmf-dist/doc/latex/hep-title/hep-title-documentation.pdf
+++ b/Master/texmf-dist/doc/latex/hep-title/hep-title-documentation.pdf
diff --git a/Master/texmf-dist/doc/latex/hep-title/hep-title-documentation.tex b/Master/texmf-dist/doc/latex/hep-title/hep-title-documentation.tex
index 0405ab55379..d97ed66becb 100644
--- a/Master/texmf-dist/doc/latex/hep-title/hep-title-documentation.tex
+++ b/Master/texmf-dist/doc/latex/hep-title/hep-title-documentation.tex
@@ -15,7 +15,7 @@
 %% and version 1.3c or later is part of all distributions of
 %% LaTeX version 2005/12/01 or later.
 
-\ProvidesFile{hep-title-documentation.tex}[2021/09/01 v1.0 hep-title documentation]
+\ProvidesFile{hep-title-documentation.tex}[2022/11/01 v1.1 hep-title documentation]
 
 \RequirePackage[l2tabu, orthodox]{nag}
 
@@ -43,7 +43,7 @@
 
 \title{The \software{hep-title} package\thanks{This document corresponds to \software{hep-title}~\fileversion.}}
 \subtitle{Extensions for the title page}
-\author{Jan Hajer \email{jan.hajer@unibas.ch}}
+\author{Jan Hajer \email{jan.hajer@tecnico.ulisboa.pt}}
 \date{\filedate}
 
 \begin{document}
@@ -63,6 +63,8 @@ They are implemented using the \software{titling} \cite{titling} and \software{a
 
 \section{Macros}
 
+If the \software{hyperref} package is loaded the \PDF meta information is set according to the "\title"\marg{text} and "\author"\marg{text} information.
+
 \subsection{Title}
 
 \DescribeMacro{\series}
@@ -71,23 +73,22 @@ They are implemented using the \software{titling} \cite{titling} and \software{a
 \DescribeMacro{\seriesfont}
 \DescribeMacro{\titlefont}
 \DescribeMacro{\subtitlefont}
-The PDF meta information is set according to the "\title"\marg{text} and "\author"\marg{text} information.
-The "\series"\marg{series} places a series title above the usual title.
+The "\series"\marg{series} places a series title above the usual title generated via "\title"\marg{title}.
 The "\subtitle"\marg{subtitle} macro places a subtitle below the usual title.
-The fonts and their size can be adjusted using the "\seriesfont", "\titlefont", and "\subtitlefont" macros.
+The fonts and their size can be adjusted using the "\seriesfont"\marg{font}, "\titlefont"\marg{font}, and "\subtitlefont"\marg{font} macros.
 
 \subsection{Authors}
 
 \DescribeMacro{\author}
-\DescribeMacro{\affiliation}
-\DescribeMacro{\editor}
-\DescribeMacro{\endorser}
-\DescribeMacro{\email}
 \DescribeMacro{\authorfont}
-\DescribeMacro{\editorfont}
-\DescribeMacro{\endorserfont}
+\DescribeMacro{\email}
+\DescribeMacro{\affiliation}
 \DescribeMacro{\affiliationfont}
 In order to facilitate multiple authors with different affiliations the \software{authblk} package \cite{authblk} is extended.
+The author macro is extended to take a affiliation label "\author"\oarg{label}\marg{name}.
+The affiliation macro takes the corresponding label "\affiliation"\oarg{label}\marg{institution}.
+Additionally, the "\email{email}" macro places a link containing the email in typewrite font into a footnote.
+The fonts can be adjusted using the "\authorfont"\marg{font} and "\affiliationfont"\marg{font} macros.
 The following lines add \eg two authors with different affiliations
 \begin{verbatim}
 \author[affil1]{Author one \email{email one}}
@@ -95,7 +96,19 @@ The following lines add \eg two authors with different affiliations
 \author[affil2]{Author two \email{email two}}
 \affiliation[affil1,affil2]{Affiliation two}
 \end{verbatim}
-Additionally the "\editor" and "\endorser" macros are provided.
+
+\DescribeMacro{\editor}
+\DescribeMacro{\endorser}
+\DescribeMacro{\editorfont}
+\DescribeMacro{\endorserfont}
+Additionally the "\editor"\oarg{label}\marg{name} and "\endorser"\oarg{label}\marg{name} macros are provided that act similar to the "\author"\oarg{label}\marg{name} macros but place their content in a dedicated line.
+Their font can be adjusted by the "\editorfont"\marg{font} and "\endorserfont"\marg{font}.
+\DescribeMacro{\editortitle}
+\DescribeMacro{\endorsertitle}
+\DescribeMacro{\editortitlefont}
+\DescribeMacro{\endorsertitlefont}
+The titles of these lines can be adjusted using the "\editortitle"\marg{singluar}\marg{plural} and  "\endorsertitle"\marg{singluar}\marg{plural} macros.
+Their font can be adjust with the "\editortitlefont"\marg{font} and "\endorsertitlefont"\marg{font}.
 
 \subsection{Abstract}
 
diff --git a/Master/texmf-dist/doc/latex/hep-title/hep-title-implementation.pdf b/Master/texmf-dist/doc/latex/hep-title/hep-title-implementation.pdf
index 7dafac24a91..1fad6acc932 100644
--- a/Master/texmf-dist/doc/latex/hep-title/hep-title-implementation.pdf
+++ b/Master/texmf-dist/doc/latex/hep-title/hep-title-implementation.pdf
diff --git a/Master/texmf-dist/doc/latex/hep-title/hep-title-test-one.tex b/Master/texmf-dist/doc/latex/hep-title/hep-title-test-one.tex
index e222ef9278f..6158eb49ca7 100644
--- a/Master/texmf-dist/doc/latex/hep-title/hep-title-test-one.tex
+++ b/Master/texmf-dist/doc/latex/hep-title/hep-title-test-one.tex
@@ -56,15 +56,17 @@
 
 \date{Date}
 
+\keywords{Keyword 1, keyword 2, keyword 3}
+
 \begin{document}
 
  \maketitle
 
- \begin{abstract}
+\begin{abstract}
 \blindtext
- \end{abstract}
+\end{abstract}
 
-First page footnote.\footnote{Footnote}
+\noindent First page footnote.\footnote{Footnote}
 
 \blinddocument
 
diff --git a/Master/texmf-dist/doc/latex/hep-title/hep-title-test-two.tex b/Master/texmf-dist/doc/latex/hep-title/hep-title-test-two.tex
index fda90081670..c46976b6463 100644
--- a/Master/texmf-dist/doc/latex/hep-title/hep-title-test-two.tex
+++ b/Master/texmf-dist/doc/latex/hep-title/hep-title-test-two.tex
@@ -56,14 +56,15 @@
 
 \date{Date}
 
-\begin{document}
+\keywords{Keyword 1, keyword 2, keyword 3}
 
+\begin{document}
 
- \begin{abstract*}
+\begin{abstract*}
 \blindtext
- \end{abstract*}
+\end{abstract*}
 
-First page footnote.\footnote{Footnote}
+\noindent First page footnote.\footnote{Footnote}
 
 \blinddocument
 
diff --git a/Master/texmf-dist/source/latex/hep-title/hep-title-implementation.dtx b/Master/texmf-dist/source/latex/hep-title/hep-title-implementation.dtx
index 9a175e673aa..da2445a4d12 100644
--- a/Master/texmf-dist/source/latex/hep-title/hep-title-implementation.dtx
+++ b/Master/texmf-dist/source/latex/hep-title/hep-title-implementation.dtx
@@ -18,8 +18,8 @@
 % \iffalse
 
 %<package>\NeedsTeXFormat{LaTeX2e}[2005/12/01]
-%<package>\ProvidesPackage{hep-title}[2021/09/01 v1.0 Extend title page macros]
-%<documentation>\ProvidesFile{hep-title-documentation.tex}[2021/09/01 v1.0 hep-title documentation]
+%<package>\ProvidesPackage{hep-title}[2022/11/01 v1.1 Extend title page macros]
+%<documentation>\ProvidesFile{hep-title-documentation.tex}[2022/11/01 v1.1 hep-title documentation]
 %
 %<*documentation>
 
@@ -56,7 +56,7 @@
 %
 % \fi
 %
-% \CheckSum{922}
+% \CheckSum{945}
 %
 % \CharacterTable
 %  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
@@ -75,6 +75,7 @@
 %   Right brace   \}     Tilde         \~}
 %
 % \changes{v1.0}{2021/09/01}{Initial version of the style file.}
+% \changes{v1.1}{2022/11/01}{Bug fixes.}
 %
 % \ifshort
 %<*documentation>
@@ -84,7 +85,7 @@
 
 \title{The \software{hep-title} package\thanks{This document corresponds to \software{hep-title}~\fileversion.}}
 \subtitle{Extensions for the title page}
-\author{Jan Hajer \email{jan.hajer@unibas.ch}}
+\author{Jan Hajer \email{jan.hajer@tecnico.ulisboa.pt}}
 \date{\filedate}
 
 % \ifshort
@@ -106,6 +107,8 @@ They are implemented using the \software{titling} \cite{titling} and \software{a
 
 \section{Macros}
 
+If the \software{hyperref} package is loaded the \PDF meta information is set according to the "\title"\marg{text} and "\author"\marg{text} information.
+
 \subsection{Title}
 
 \DescribeMacro{\series}
@@ -114,23 +117,22 @@ They are implemented using the \software{titling} \cite{titling} and \software{a
 \DescribeMacro{\seriesfont}
 \DescribeMacro{\titlefont}
 \DescribeMacro{\subtitlefont}
-The PDF meta information is set according to the "\title"\marg{text} and "\author"\marg{text} information.
-The "\series"\marg{series} places a series title above the usual title.
+The "\series"\marg{series} places a series title above the usual title generated via "\title"\marg{title}.
 The "\subtitle"\marg{subtitle} macro places a subtitle below the usual title.
-The fonts and their size can be adjusted using the "\seriesfont", "\titlefont", and "\subtitlefont" macros.
+The fonts and their size can be adjusted using the "\seriesfont"\marg{font}, "\titlefont"\marg{font}, and "\subtitlefont"\marg{font} macros.
 
 \subsection{Authors}
 
 \DescribeMacro{\author}
-\DescribeMacro{\affiliation}
-\DescribeMacro{\editor}
-\DescribeMacro{\endorser}
-\DescribeMacro{\email}
 \DescribeMacro{\authorfont}
-\DescribeMacro{\editorfont}
-\DescribeMacro{\endorserfont}
+\DescribeMacro{\email}
+\DescribeMacro{\affiliation}
 \DescribeMacro{\affiliationfont}
 In order to facilitate multiple authors with different affiliations the \software{authblk} package \cite{authblk} is extended.
+The author macro is extended to take a affiliation label "\author"\oarg{label}\marg{name}.
+The affiliation macro takes the corresponding label "\affiliation"\oarg{label}\marg{institution}.
+Additionally, the "\email{email}" macro places a link containing the email in typewrite font into a footnote.
+The fonts can be adjusted using the "\authorfont"\marg{font} and "\affiliationfont"\marg{font} macros.
 The following lines add \eg two authors with different affiliations
 \begin{verbatim}
 \author[affil1]{Author one \email{email one}}
@@ -138,7 +140,19 @@ The following lines add \eg two authors with different affiliations
 \author[affil2]{Author two \email{email two}}
 \affiliation[affil1,affil2]{Affiliation two}
 \end{verbatim}
-Additionally the "\editor" and "\endorser" macros are provided.
+
+\DescribeMacro{\editor}
+\DescribeMacro{\endorser}
+\DescribeMacro{\editorfont}
+\DescribeMacro{\endorserfont}
+Additionally the "\editor"\oarg{label}\marg{name} and "\endorser"\oarg{label}\marg{name} macros are provided that act similar to the "\author"\oarg{label}\marg{name} macros but place their content in a dedicated line.
+Their font can be adjusted by the "\editorfont"\marg{font} and "\endorserfont"\marg{font}.
+\DescribeMacro{\editortitle}
+\DescribeMacro{\endorsertitle}
+\DescribeMacro{\editortitlefont}
+\DescribeMacro{\endorsertitlefont}
+The titles of these lines can be adjusted using the "\editortitle"\marg{singluar}\marg{plural} and  "\endorsertitle"\marg{singluar}\marg{plural} macros.
+Their font can be adjust with the "\editortitlefont"\marg{font} and "\endorsertitlefont"\marg{font}.
 
 \subsection{Abstract}
 
@@ -240,7 +254,7 @@ The "\preprintfont" macro can be used to change the font of the preprint.
 % \end{macro}
 %
 % \begin{macro}{\placepreprint}
-% Places a preprint number in the top right corner of the title page using the \software{atbegshi} \cite{atbegshi} and \software{picture} \cite{picture} packages.
+% Places a preprint number in the top right corner of the title page using the \software{calc} \cite{calc}, \software{atbegshi} \cite{atbegshi}, and \software{picture} \cite{picture} packages.
 %    \begin{macrocode}
 \RequirePackage{calc}
 \RequirePackage{atbegshi}
@@ -298,7 +312,7 @@ The "\preprintfont" macro can be used to change the font of the preprint.
   \@ifundefined{hep@series}{}{%
     \hep@pre@series\hep@series\hep@post@series%
   }%
-  \vspace{-\bigskipamount}%
+%   \vspace{-\bigskipamount}%
 }
 %    \end{macrocode}
 % \end{macro}
@@ -477,7 +491,7 @@ The "\preprintfont" macro can be used to change the font of the preprint.
 %    \end{macrocode}
 % \end{macro}
 %
-% Switch authblk to a label ref system for affiliations.
+% Switch authblk to a label ref system for affiliations using the \software{xpatch} package \cite{xpatch}.
 %    \begin{macrocode}
 \RequirePackage{xpatch}
 \xpatchcmd{\author}{%
@@ -651,7 +665,7 @@ The "\preprintfont" macro can be used to change the font of the preprint.
   \AB@affilnote{\AB@note}%
 }{%
   \protect\refstepcounter{affiliation}\protect\label{\AB@note}%
-  \if\relax#1\relax\else\protect\ref{\AB@note}\fi%
+  \if\relax#1\relax\else\protect\theaffiliation\fi%
 }{}{}
 %    \end{macrocode}
 %
@@ -699,7 +713,9 @@ The "\preprintfont" macro can be used to change the font of the preprint.
   \fi
 %       \\[\affilsep]
   \ifx\AB@affillist\AB@empty\else%
-    \begin{center}\AB@affillist\end{center}%
+    \ifnum\value{affil}>\value{Maxaffil}
+      \begin{center}\AB@affillist\end{center}%
+    \fi%
   \fi%
 }
 %    \end{macrocode}
@@ -707,8 +723,7 @@ The "\preprintfont" macro can be used to change the font of the preprint.
 % \begin{macro}{\@author}
 % Ensure that affiliation is not set directly below author
 %    \begin{macrocode}
-\def\@author{}
-\renewcommand\@author{%
+\def\@author{%
   \ifx\AB@affillist\AB@empty%
     \AB@author%
   \else%
@@ -757,6 +772,15 @@ The "\preprintfont" macro can be used to change the font of the preprint.
 \@ifundefined{abstract}{}{%
   \let\hep@abstract\abstract%
   \renewcommand\abstract{\hep@abstract\noindent\ignorespaces}%
+  \let\hep@key@words\relax
+  \newcommand{\keywords}[1]{\def\hep@key@words{#1}}
+  \AtBeginDocument{\@ifundefined{hep@key@words}{}{%
+    \let\hep@end@abstract\endabstract%
+    \renewcommand\endabstract{
+      \par\medskip\noindent\textit{Keywords: \hep@key@words}%
+      \hep@end@abstract%
+    }%
+  }}
 %    \end{macrocode}
 % \end{environment}
 % \begin{environment}{abstract*}
@@ -857,17 +881,19 @@ The "\preprintfont" macro can be used to change the font of the preprint.
 
 \date{Date}
 
-\begin{document}
+\keywords{Keyword 1, keyword 2, keyword 3}
 
+\begin{document}
+%<testone>
 %<testone> \maketitle
 
-%<testone> \begin{abstract}
-%<testtwo> \begin{abstract*}
+%<testone>\begin{abstract}
+%<testtwo>\begin{abstract*}
 \blindtext
-%<testone> \end{abstract}
-%<testtwo> \end{abstract*}
+%<testone>\end{abstract}
+%<testtwo>\end{abstract*}
 
-First page footnote.\footnote{Footnote}
+\noindent First page footnote.\footnote{Footnote}
 
 \blinddocument
 
diff --git a/Master/texmf-dist/tex/latex/hep-title/hep-title.sty b/Master/texmf-dist/tex/latex/hep-title/hep-title.sty
index f36504469ac..e3e217774da 100644
--- a/Master/texmf-dist/tex/latex/hep-title/hep-title.sty
+++ b/Master/texmf-dist/tex/latex/hep-title/hep-title.sty
@@ -16,7 +16,7 @@
 %% LaTeX version 2005/12/01 or later.
 
 \NeedsTeXFormat{LaTeX2e}[2005/12/01]
-\ProvidesPackage{hep-title}[2021/09/01 v1.0 Extend title page macros]
+\ProvidesPackage{hep-title}[2022/11/01 v1.1 Extend title page macros]
 
 \providecommand{\online}[2]{\texttt{#2}}%
 \providecommand{\hep@email}[1]{\online{mailto:#1}{#1}}
@@ -73,7 +73,6 @@
   \@ifundefined{hep@series}{}{%
     \hep@pre@series\hep@series\hep@post@series%
   }%
-  \vspace{-\bigskipamount}%
 }
 \let\hep@title@font\relax
 \newcommand{\titlefont}[1]{\def\hep@title@font{#1}}
@@ -307,7 +306,7 @@
   \AB@affilnote{\AB@note}%
 }{%
   \protect\refstepcounter{affiliation}\protect\label{\AB@note}%
-  \if\relax#1\relax\else\protect\ref{\AB@note}\fi%
+  \if\relax#1\relax\else\protect\theaffiliation\fi%
 }{}{}
 \let\hep@affiliation@font\relax
 \newcommand{\affiliationfont}[1]{\def\hep@affiliation@font{#1}}
@@ -333,11 +332,12 @@
     \hep@pre@endorser\hep@endorserlist\hep@post@endorser%
   \fi
   \ifx\AB@affillist\AB@empty\else%
-    \begin{center}\AB@affillist\end{center}%
+    \ifnum\value{affil}>\value{Maxaffil}
+      \begin{center}\AB@affillist\end{center}%
+    \fi%
   \fi%
 }
-\def\@author{}
-\renewcommand\@author{%
+\def\@author{%
   \ifx\AB@affillist\AB@empty%
     \AB@author%
   \else%
@@ -357,6 +357,15 @@
 \@ifundefined{abstract}{}{%
   \let\hep@abstract\abstract%
   \renewcommand\abstract{\hep@abstract\noindent\ignorespaces}%
+  \let\hep@key@words\relax
+  \newcommand{\keywords}[1]{\def\hep@key@words{#1}}
+  \AtBeginDocument{\@ifundefined{hep@key@words}{}{%
+    \let\hep@end@abstract\endabstract%
+    \renewcommand\endabstract{
+      \par\medskip\noindent\textit{Keywords: \hep@key@words}%
+      \hep@end@abstract%
+    }%
+  }}
   \if@twocolumn
     \RequirePackage{environ}
     \RequirePackage{abstract}