@inproceedings{DAC-1981-LacroixP,
	acmid         = "802371",
	author        = "Michel Lacroix and Alain Pirotte",
	booktitle     = "{Proceedings of the 18th Design Automation Conference}",
	pages         = "653--659",
	publisher     = "{ACM/IEEE}",
	title         = "{Data structures for CAD object description}",
	year          = 1981,
}