@inproceedings{ILPS-1994-TomanCR,
	author        = "David Toman and Jan Chomicki and David S. Rogers",
	booktitle     = "{Proceedings of the International Symposium on Logic Programming}",
	isbn          = "0-262-52191-1",
	pages         = "189--203",
	publisher     = "{MIT Press}",
	title         = "{Datalog with Integer Periodicity Constraints}",
	year          = 1994,
}