Isla, D. Handling complexity in the Halo 2 AI. Retrieved June 11, 2007, from Gamasutra: http://www.gamasutra.com/gdc2005/features/20050311/isla 01.shtml
Lester, P. A* Pathfinding for beginners. Retrieved June 11, 2007, from the GameDev website: http://www.gamedev.net/reference/programming/features/astar/
Long, D. et al. (2003). Working group on Goal-oriented Action Planning. AIISC.
Munóz-Avila, H., and Lee-Urban, H. (2005). Hierarchical plan representations for encoding strategic game AI. Proceedings of Artificial Intelligence and Interactive Digital Entertainment Conference 2005. 1(2005): pp. 63-69
Nareyek, A. et al. (2005). Working group on Goal-oriented Action Planning. AIISC.
Orkin, J. (2002). Applying goal oriented action planning in games. In AI Game Programming Wisdom 2 pp. 217-229. Charles River Media.
Orkin, J. (2003). Applying blackboard systems to FPS. Austin, TX: Digital Media Collaboratory.