@InProceedings{rclp-1991,
	author = 	{N. Kehrer and  G. Neumann},
	title = 	{Treating Enhanced Entity Relationship Models in a Declarative  Style},
	year = 	{1992},
	month = 	{February},
	category = 	{NM, data modeling, logic programming},
	ps = 	{http://nm.wu-wien.ac.at/research/publications/rclp-1991.ps},
	pdf = 	{http://nm.wu-wien.ac.at/research/publications/rclp-1991.pdf},
	booktitle = 	{Proceedings of the 2nd Russian    Conference on Logic Programming, September 1991, Leningrad, in:Lecture Notes in Artificial Intelligence 592},
	address = 	{Berlin},
}