@inproceedings{1041179, title = "Design patterns and class evoloution", author = "Κοπανιτσάνος, Αντώνης and Βλάχου, Αγγελική and Γυφτοδήμος, Γεώργιος", year = "2001", pages = "70-79", publisher = "Εκδοτικός Οργανισμός Λιβάνη", booktitle = "8th Panhellenic Conference in Informatics Proceedings (Volume 1)" }