@BOOK{hodges-logic, AUTHOR = {Hodges, Wilfred}, PUBLISHER = {Penguin}, DATE = {1977, 1991}, ISBN = {0140136363}, TITLE = {Logic: An Introduction to Elementary Logic}, } @MANUAL{tantau-tikz-pgf-manual, AUTHOR = {Tantau, Till}, URL = {http://sourceforge.net/projects/pgf}, DATE = {2015-08-29}, EDITION = {3.0.1a}, KEYWORDS = {TeX,LaTeX,PGF,TikZ}, SUBTITLE = {Manual for Version 3.0.1a}, TITLE = {The {T}i\mkbibemph{k}{Z} and {PGF} Packages}, } @MANUAL{saso-forest-manual, AUTHOR = {Živanović, Sašo}, URL = {http://spj.ff.uni-lj.si/zivanovic/}, DATE = {2016-03-04}, EDITION = {2.0.2}, KEYWORDS = {TeX,LaTeX,PGF,TikZ,Forest}, TITLE = {Forest: A {PGF}/Ti\mkbibemph{k}{Z}-Based Package for Drawing Linguistic Trees}, }