ICAPS 2014 talk on the paper
Blai Bonet, Menkes van den Briel.
Flow-based Heuristics for Optimal Planning: Landmarks and Merges.
Proceedings of the Twenty-Fourth International Conference on Automated
Planning and Scheduling. pp. 47-55. 2014. AAAI Press
(online available at
http://www.aaai.org/ocs/index.php/ICAPS/ICAPS14/paper/view/7933)
