@inproceedings{SAC-1996-GowerW,
	author        = "Michelle Gower and Ralph W. Wilkerson",
	booktitle     = "{Proceedings of the 11th Symposium on Applied Computing}",
	doi           = "10.1145/331119.331148",
	pages         = "73--76",
	publisher     = "{ACM}",
	title         = "{R-by-C Crozzle: an NP-hard problem}",
	year          = 1996,
}