@InProceedings{kn92,
	author = 	{N. Kehrer and G. Neumann},
	title = 	{An EER Prototyping Environment and its Implemetation in a Datalog Language},
	year = 	{1992},
	month = 	{October},
	category = 	{NM, data modeling, logic programming},
	ps = 	{http://nm.wu-wien.ac.at/research/publications/kn92.ps},
	pdf = 	{http://nm.wu-wien.ac.at/research/publications/kn92.pdf},
	booktitle = 	{Entity-Relationship Approach - ER},
	address = 	{Karlsruhe, Germany},
	pages = 	{243-261},
}