@inproceedings{SEKE-2006-YuC,
	author        = "Liguo Yu and Kai Chen",
	booktitle     = "{Proceedings of the 18th International Conference on Software Engineering and Knowledge Engineering}",
	isbn          = "1-891706-18-7",
	pages         = "242--245",
	title         = "{An Empirical Study of the Maintenance Effort}",
	year          = 2006,
}