@inproceedings{FM-1998-PuitgD,
	author        = "François Puitg and Jean-François Dufourd",
	booktitle     = "{Proceedings of the International Workshop on Current Trends in Applied Formal Methods}",
	doi           = "10.1007/3-540-48257-1_3",
	isbn          = "3-540-66462-9",
	pages         = "62--76",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Formal Program Development in Geometric Modeling}",
	volume        = 1641,
	year          = 1998,
}