Richard Watson, Eric Salzman. Tracing the Evaluation of Lazy Functional Languages: A Model and its Implementation. In R. K. Shyamasundar, Kazunori Ueda, editors, Advances in Computing Science - ASIAN 97, Third Asian Computing Science Conference, Kathmandu, Nepal, December 9-11, 1997, Proceedings. Volume 1345 of Lecture Notes in Computer Science, pages 336-350, Springer, 1997.