@inproceedings{SAC-1996-WassermanYS,
	author        = "Howard C. Wasserman and Keitaro Yukawa and Zhizhang Shen",
	booktitle     = "{Proceedings of the 11th Symposium on Applied Computing}",
	doi           = "10.1145/331119.331145",
	pages         = "58--62",
	publisher     = "{ACM}",
	title         = "{On quantitative measurement of negation in logic programming}",
	year          = 1996,
}