@inproceedings{TAPSOFT-1997-LeavensW,
	author        = "Gary T. Leavens and Jeannette M. Wing",
	booktitle     = "{Proceedings of the Seventh International Joint Conference on Theory and Practice of Software Development}",
	doi           = "10.1007/BFb0030623",
	isbn          = "3-540-62781-2",
	pages         = "520--534",
	publisher     = "{Springer}",
	title         = "{Protective Interface Specifications}",
	year          = 1997,
}