@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)"
}