Douglas M. Campbell, David W. Embley, Bogdan D. Czejdo. A Relationally Complete Query Language for an Entity-Relationship Model. In Peter P. Chen, editor, Entity-Relationship Approach: The Use of ER Concept in Knowledge Representation, Proceedings of the Fourth International Conference on Entity-Relationship Approach, Chicago, Illinois, USA, 29-30 October 1985. pages 90-97, IEEE Computer Society and North-Holland, 1985. [doi]
Abstract is missing.