@article{WRLA-J-1996-WirsingK02,
	author        = "Martin Wirsing and Alexander Knapp",
	doi           = "10.1016/S0304-3975(01)00367-X",
	journal       = "{Theor. Comput. Sci}",
	number        = 2,
	pages         = "519--560",
	title         = "{A formal approach to object-oriented software engineering}",
	volume        = 285,
	year          = 2002,
}