@InProceedings{l00-p135-144, AUTHOR = {Cl\'audia Linhares~Sales and Fr\'ed\'eric Maffray}, TITLE = {On Dart-Free Perfectly Contractile Graphs. Extended Abstract}, YEAR = 2000, BOOKTITLE = {Proc.~of the 4th Latin American Symposium on Theoretical Informatics (LATIN'00)}, ADDRESS = {Punta del Este, Uruguay}, PAGES = {135--144}, KEYWORDS = {}}