Packet switched network in Japan. - Toshiharu Takatsuki; Jiro Iimura; Masato Chiba; Masayuki Abe (AFIPS National Computer Conference, 1977)

DDX [Japanese digital switching network]. - Masao Kato; Toshiharu Takatsuki; Yutaka Yoshida (IEEE Commun. Mag., 1981)