Microprocessor Application to Telephone Terminal Switching System Architecture. - Keiji Okada; Haruhisa Ichikawa; Toru Miyake; Norio Sato (IEEE Trans. Commun., 1979)

An automaton decomposition method for program structure simplification. - Yutaka Hirakawa; Keiji Okada (Syst. Comput. Jpn., 1985)

Connectivity of Regular Directed Graphs with Small Diameters. - Makoto Imase; Terunao Soneoka; Keiji Okada (IEEE Trans. Computers, 1985)

Fault-tolerant processor interconnection networks. - Makoto Imase; Terunao Soneoka; Keiji Okada (Syst. Comput. Jpn., 1986)

Nano-Function materials for TSV technologies. - Hiroaki Ikeda; Shigenobu Sekine; Ryuji Kimura; Koichi Shimokawa; Keiji Okada; Hiroaki Shindo; Tatsuya Ooi; Rei Tamaki; Makoto Nagata (3DIC, 2015)