1. Balzer, R.: An 8-state minimal time solution to the firing squad synchronization problem. Information and Control 10, 22–42 (1967)
2. Beyer, W.T.: Recognition of topological invariants by iterative arrays. Ph.D. Thesis. MIT, pp. 144 (1969)
3. Gerken, H.: Über Synchronisations - Probleme bei Zellularautomaten. Diplomarbeit, Institut für Theoretische Informatik, Technische Universität Braunschweig, pp. 50 (1987)
4. Goto, E.: A minimal time solution of the firing squad problem. Dittoed course notes for Applied Mathematics 298, Harvard University, with an illustration in color, pp. 52–59 (1962)
5. Grasselli, A.: Synchronization of cellular arrays: The firing squad problem in two dimensions. Information and Control 28, 113–124 (1975)