Constructibility of Signal-Crossing Solutions in von Neumann 29-State Cellular Automata. - William R. Buckley; Amar Mukherjee (International Conference on Computational Science (2), 2005)

Signal crossing solutions in von Neumann self-replicating cellular automata. - William R. Buckley (Automata, 2008)

Computational Ontogeny. - William R. Buckley (IJCCI, 2012)