An efficient algorithm for the dot generation of arbitrary ellipses. - Goro Koda; Kensuke Shimizu (Syst. Comput. Jpn., 1986)

Exor Decomposition with Common Variables and its Application to Multiple-Output Networks. - Ryoji Ishikawa; Goro Koda; Kensuke Shimizu; Takashi Hirayama (J. Circuits Syst. Comput., 1999)

New Three-Level Boolean Expression Based on EXOR Gates. - Ryoji Ishikawa; Takashi Hirayama; Goro Koda; Kensuke Shimizu (IEICE Trans. Inf. Syst., 2004)