@inproceedings{SEKE-2008-Mikolajczak,
	author        = "Boleslaw Mikolajczak",
	booktitle     = "{Proceedings of the 20th International Conference on Software Engineering and Knowledge Engineering}",
	isbn          = "1-891706-22-5",
	pages         = "267--272",
	publisher     = "{Knowledge Systems Institute Graduate School}",
	title         = "{Formal Specification of Object-oriented Systems with Collaborative Objects and Petri Nets — a Case Study}",
	year          = 2008,
}