@inproceedings{WCRE-1999-PentaG99a,
	author        = "Massimiliano Di Penta and Daniel M. Germán",
	booktitle     = "{Proceedings of the 16th Working Conference on Reverse Engineering}",
	doi           = "10.1109/WCRE.2009.41",
	editor        = "Andy Zaidman and Giuliano Antoniol and Stéphane Ducasse",
	isbn          = "978-0-7695-3867-9",
	pages         = "11--20",
	publisher     = "{IEEE Computer Society}",
	title         = "{Who are Source Code Contributors and How do they Change?}",
	year          = 2009,
}