@inproceedings{ICLP-1999-ZukowskiF,
	author        = "Ulrich Zukowski and Burkhard Freitag",
	booktitle     = "{Proceedings of the 15th International Conference on Logic Programming}",
	isbn          = "0-262-54104-1",
	pages         = "456--470",
	publisher     = "{MIT Press}",
	title         = "{Well-founded Semantics by Transformation: The Non-ground Case}",
	year          = 1999,
}