@inproceedings{SAC-1997-BinkleyK,
	author        = "David Binkley and Bradley M. Kuhn",
	booktitle     = "{Proceedings of the 12th Symposium on Applied Computing}",
	doi           = "10.1145/331697.331705",
	pages         = "30--34",
	publisher     = "{ACM}",
	title         = "{Crozzle: an NP-complete problem}",
	year          = 1997,
}