@inproceedings{ILPS-1994-Ross,
	author        = "Kenneth A. Ross",
	booktitle     = "{Proceedings of the International Symposium on Logic Programming}",
	isbn          = "0-262-52191-1",
	pages         = "76--90",
	publisher     = "{MIT Press}",
	title         = "{A Syntactic Stratification Condition Using Constraints}",
	year          = 1994,
}