A Construction Method of Moore Neighborhood Number-Conserving Cellular Automata. - Naonori Tanimoto; Katsunobu Imai (ACRI, 2008)

On the Non-existance of Rotation-Symmetric von Neumann Neighbor Number-Conserving Cellular Automata of Which the State Number is Less than Four. - Naonori Tanimoto; Katsunobu Imai; Chuzo Iwamoto; Kenichi Morita (IEICE Trans. Inf. Syst., 2009)

A Characterization of von Neumann Neighbor Number-Conserving Cellular Automata. - Naonori Tanimoto; Katsunobu Imai (J. Cell. Autom., 2009)