@inproceedings{SAC-2008-JermannH,
	author        = "Christophe Jermann and Hiroshi Hosobe",
	booktitle     = "{Proceedings of the 23rd Symposium on Applied Computing}",
	doi           = "10.1145/1363686.1364130",
	editor        = "Roger L. Wainwright and Hisham Haddad",
	isbn          = "978-1-59593-753-7",
	pages         = "1843--1844",
	publisher     = "{ACM}",
	title         = "{A constraint hierarchies approach to geometric constraints on sketches}",
	year          = 2008,
}