Karl J. Lieberherr, Paul L. Bergstein, Ignacio Silva-Lepe. Abstraction of Object-Oriented Data Models. In Hannu Kangassalo, editor, Proceedings of the 9th International Conference on Entity-Relationship Approach (ER 90), 8-10 October, 1990, Lausanne, Switzerland. pages 81-94, ER Institute, 1990. [doi]
Abstract is missing.