@inproceedings{ICPR-v3-2004-KuijperO,
	author        = "Arjan Kuijper and Ole Fogh Olsen",
	booktitle     = "{Proceedings of the 17th International Conference on Pattern Recognition, Volume 3}",
	doi           = "10.1109/ICPR.2004.952",
	isbn          = "0-7695-2128-2",
	pages         = "190--193",
	publisher     = "{IEEE Computer Society}",
	title         = "{Transitions of the Pre-Symmetry Set}",
	year          = 2004,
}