Gabriel M. Kuper, Moshe Y. Vardi. On the Expressive Power of the Logical Data Model (Preliminary Report). In Shamkant B. Navathe, editor, Proceedings of the 1985 ACM SIGMOD International Conference on Management of Data, Austin, Texas, May 28-31, 1985. pages 180-187, ACM Press, 1985. [doi]
Abstract is missing.