@inproceedings{SAC-1995-Cheung,
	author        = "Bruce S. N. Cheung",
	booktitle     = "{Proceedings of the 10th Symposium on Applied Computing}",
	doi           = "10.1145/315891.315991",
	pages         = "272--276",
	publisher     = "{ACM}",
	title         = "{Ambiguity in context-free grammars}",
	year          = 1995,
}