David Hopkins, C.-H. Luke Ong. Homer: A Higher-Order Observational Equivalence Model checkER. In Ahmed Bouajjani, Oded Maler, editors, Computer Aided Verification, 21st International Conference, CAV 2009, Grenoble, France, June 26 - July 2, 2009. Proceedings. Volume 5643 of Lecture Notes in Computer Science, pages 654-660, Springer, 2009. [doi]