Ralf Lämmel, Ondrej Rypacek. The Expression Lemma. In Philippe Audebaud, Christine Paulin-Mohring, editors, Mathematics of Program Construction, 9th International Conference, MPC 2008, Marseille, France, July 15-18, 2008. Proceedings. Volume 5133 of Lecture Notes in Computer Science, pages 193-219, Springer, 2008. [doi]
Abstract is missing.