Speeding-Up Cellular Automata by Alternations. - Chuzo Iwamoto; Katsuyuki Tateishi; Kenichi Morita; Katsunobu Imai (MCU, 2001)

A quadratic speedup theorem for iterative arrays. - Chuzo Iwamoto; Katsuyuki Tateishi; Kenichi Morita; Katsunobu Imai (Acta Informatica, 2002)

Simulations Between Multi-dimensional Deterministic and Alternating Cellular Automata. - Chuzo Iwamoto; Katsuyuki Tateishi; Kenichi Morita; Katsunobu Imai (Fundam. Informaticae, 2003)