1. A modern treatment of the 15-puzzle;Archer;American Mathematical Monthly,1999
2. Searching in the plane;Baeza-Yates;Information and Computation,1993
3. Marcel Ball, Robert C. Holte, The compression power of symbolic pattern databases, in: Proceedings of the 18th International Conference on Automated Planning and Scheduling (ICAPS 2008), 2008, pp. 2–11.
4. Planning as heuristic search;Bonet;Artificial Intelligence,2001
5. Searching with pattern databases;Culberson,1996