@inproceedings{ICLP-1986-StepanekS86,
	author        = "Petr Stepánek and Olga Stepánková",
	booktitle     = "{Proceedings of the Third International Conference on Logic Programming}",
	doi           = "10.1007/3-540-16492-8_67",
	isbn          = "3-540-16492-8",
	pages         = "99--106",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Logic Programs and Alternation}",
	volume        = 225,
	year          = 1986,
}