@inproceedings{ESEC-1987-HekmatpourW,
	author        = "Sharam Hekmatpour and Mark Woodman",
	booktitle     = "{Proceedings of the First European Software Engineering Conference}",
	doi           = "10.1007/BFb0022122",
	editor        = "Howard K. Nichols and Dan Simpson",
	isbn          = "3-540-18712-X",
	pages         = "297--305",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Formal Specification of Graphical Notations and Graphical Software Tools}",
	volume        = 289,
	year          = 1987,
}