@inproceedings{IFM-1999-PolHJ,
	author        = "Jaco van de Pol and Jozef Hooman and Edwin D. de Jong",
	booktitle     = "{Proceedings of the First International Conference on Integrated Formal Methods}",
	isbn          = "1-85233-107-0",
	pages         = "109--128",
	publisher     = "{Springer-Verlag}",
	title         = "{Modular Formal Specification of Data and Behaviour}",
	year          = 1999,
}