Aart Middeldorp. Modular Aspects of Properties of Term Rewriting Systems Related to Normal Forms. In Nachum Dershowitz, editor, Rewriting Techniques and Applications, 3rd International Conference, RTA-89, Chapel Hill, North Carolina, USA, April 3-5, 1989, Proceedings. Volume 355 of Lecture Notes in Computer Science, pages 263-277, Springer, 1989.