Latha S. Colby. A Recursive Algebra and Query Optimization for Nested Relations. In James Clifford, Bruce G. Lindsay, David Maier, editors, Proceedings of the 1989 ACM SIGMOD International Conference on Management of Data, Portland, Oregon, May 31 - June 2, 1989. pages 273-283, ACM Press, 1989. [doi]
Abstract is missing.