Pierre Courtieu, Julien Forest, Xavier Urbain. Certifying a Termination Criterion Based on Graphs, without Graphs. In Otmane Aït Mohamed, César Muñoz, Sofiène Tahar, editors, Theorem Proving in Higher Order Logics, 21st International Conference, TPHOLs 2008, Montreal, Canada, August 18-21, 2008. Proceedings. Volume 5170 of Lecture Notes in Computer Science, pages 183-198, Springer, 2008. [doi]