@InProceedings{l92-p76-86, AUTHOR = {Francis Bossut and Bruno Warnin}, TITLE = {Automata and Pattern Matching in Planar Directed Acyclic Graphs}, YEAR = 1992, BOOKTITLE = {Proc.~of the 1st Latin American Symposium on Theoretical Informatics (LATIN'92)}, ADDRESS = {S\~ao Paulo, Brazil}, PAGES = {76--86}, KEYWORDS = {}}