@inproceedings{ESOP-2000-Charatonik,
	author        = "Witold Charatonik",
	booktitle     = "{Proceedings of the Ninth European Symposium on Programming}",
	doi           = "10.1007/3-540-46425-5_5",
	editor        = "Gert Smolka",
	isbn          = "3-540-67262-1",
	pages         = "72--87",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Directional Type Checking for Logic Programs: Beyond Discriminative Types}",
	volume        = 1782,
	year          = 2000,
}