@inproceedings{SIGMOD-1991-GuntzerKT,
	author        = "Ulrich Güntzer and Werner Kießling and Helmut Thöne",
	booktitle     = "{Proceedings of the 21st ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD91/P178.PDF",
	doi           = "10.1145/115790.115815",
	pages         = "178--187",
	title         = "{New Directions For Uncertainty Reasoning In Deductive Databases}",
	year          = 1991,
}