Michel Schneider, Claude Trépied. A Graphical Query Language Based on an Extended E-R Model. In Frederick H. Lochovsky, editor, Entity-Relationship Approach to Database Design and Querying, Proceedings of the Eight International Conference on Enity-Relationship Approach, Toronto, Canada, 18-20 October, 1989. pages 403-417, North-Holland, 1989. [doi]
Abstract is missing.