Crossrefware Bundle version 2.1a Scripts useful for working with Crossref, MathSciNet and Zentralblatt MATH. This work was commissioned by The Saint Lois University and The Princeton University (Mathematics Department) bibdoiadd.pl - add DOI numbers to papers in a given bib file bibzbladd.pl - add Zbl numbers to papers in a given bib file bibmradd.pl - add MR numbers to papers in a given bib file bbl2bib.pl - convert `thebibliography' environment to a bib file ltx2crossrefxml.pl - a tool for creation of XML files for submitting to crossref.org The scripts use bibtexperllibs libraries from CTAN Installation: 1. Move *.pl files to the binaries directory in your system. 2. Use *.cfg files as configuration files samples. 3. Move *.1 to the man pages directory in your system. Changes: Version 2.1a: Bug in bbl2bib corrected Version 2.1: New options to add empty doi and zbl when doi or zbl are not found to prevent repeated searches. Added bibmradd.pl Added bbl2bib.pl Version 2.0: Moved to BibTeX::Parser suite. Now we use new Zbmath interface. Now we use bibtexperllibs libraries Version 1.1: workaround for a bug with macrons in TeX::Encode