ICAPS 2014 talk on the paper
Bram Ridder, Maria Fox.
Heuristic Evaluation Based on Lifted Relaxed Planning Graphs.
Proceedings of the Twenty-Fourth International Conference on Automated
Planning and Scheduling. pp. 244-252. 2014. AAAI Press
(online available at
http://www.aaai.org/ocs/index.php/ICAPS/ICAPS14/paper/view/7948)