1. Lessons in Play
2. Berlekamp, E., Conway, J. H., Guy, R. (2001–2004). Winning Ways for your Mathematical Plays, 2nd ed. Natick, MA: A. K. Peters, Ltd.
3. Brunck F. (April 2002). Personal communication.
4. Motion Planning for Metamorphic Systems: Feasibility, Decidability, and Distributed Reconfiguration
5. Discrete Dynamical Systems