Marc Gyssens, Dirk Van Gucht. The Powerset Algebra as a Result of Adding Programming Constructs to the Nested Relational Algebra. In Haran Boral, Per-Åke Larson, editors, Proceedings of the 1988 ACM SIGMOD International Conference on Management of Data, Chicago, Illinois, June 1-3, 1988. pages 225-232, ACM Press, 1988. [doi]
Abstract is missing.