@inproceedings{SEKE-2002-CostagliolaDFG,
	author        = "Gennaro Costagliola and Vincenzo Deufemia and Filomena Ferrucci and Carmine Gravino",
	booktitle     = "{Proceedings of the 14th International Conference on Software Engineering and Knowledge Engineering}",
	doi           = "10.1145/568760.568795",
	isbn          = "1-58113-556-4",
	pages         = "201--208",
	publisher     = "{ACM}",
	title         = "{Using extended positional grammars to develop visual modeling languages}",
	year          = 2002,
}