New Development Method of Office Automation-Oriented PBX's. - Kouya Hasui; Shuzo Morita; Yoshinobu Fujii; Norihiro Aritaka (IEEE J. Sel. Areas Commun., 1985)

Man-machine interfaces in office communication systems. - Kouya Hasui; Shuzo Morita (IEEE Commun. Mag., 1986)