E. Karpas and C. Domshlak
Optimal Search with Inadmissible Heuristics
J. Thayer, R. Stern, A. Felner and W. Ruml
Faster Bounded-Cost Search Using Inadmissible Estimates
L. Lelis, R. Stern, A. Felner, S. Zilles and R. Holte
Predicting Optimal Solution Cost with Bidirectional Stratified Sampling