Martin Gogolla, Bernd Meyer, Gerd Westerman. Drafting Extended Entity-Relationship Schemas with QUEER. In Toby J. Teorey, editor, Proceedings of the 10th International Conference on Entity-Relationship Approach (ER 91), 23-25 October, 1991, San Mateo, California, USA. pages 561-585, ER Institute, 1991. [doi]
Abstract is missing.