A Time Hierarchy Theorem for Nondeterministic Cellular Automata. - Chuzo Iwamoto; Harumasa Yoneda; Kenichi Morita; Katsunobu Imai (TAMC, 2007)

A Recursive Padding Technique on Nondeterministic Cellular Automata. - Chuzo Iwamoto; Harumasa Yoneda; Kenichi Morita; Katsunobu Imai (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)