@inproceedings{VDME-1991-Woodcock91b,
	author        = "Jim Woodcock",
	booktitle     = "{Proceedings of the Fourth International Symposium on Vienna Development Method: Formal Software Development. Volume 2: Tutorials}",
	isbn          = "3-540-54868-8",
	pages         = "96--117",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{An Introduction to Refinement in Z}",
	volume        = 552,
	year          = 1991,
}