@inproceedings{SAC-1993-HarrisFR,
	author        = "Geoff Harris and John Forster and Richard Rankin",
	booktitle     = "{Proceedings of the Eighth Symposium on Applied Computing: States of the Art and Practice}",
	doi           = "10.1145/162754.162892",
	pages         = "257--262",
	publisher     = "{ACM Press}",
	title         = "{Basic Blocks in Unconstrained Crossword Puzzles}",
	year          = 1993,
}