Pedro Celis, Hansjörg Zeller. Subquery Elimination: A Complete Unnesting Algorithm for an Extended Relational Algebra. In W. A. Gray, Per-Åke Larson, editors, Proceedings of the Thirteenth International Conference on Data Engineering, April 7-11, 1997 Birmingham U.K. pages 321, IEEE Computer Society, 1997. [doi]
Abstract is missing.