General-Purpose Subscriber Circuit Using High-Voltage LSI for NEAX-61 Fully Digital Local Switch. - Masanobu Arai; Koichi Nishimura; Takao Hayashi; Takashi Shinozuka; Koichi Hasegawa (ICC (1), 1984)

Long-Range Flicker-Free LED-to-Camera Communication using Differential Color Shift Keying. - Yuki Hokazono; Koichi Hasegawa; Yoshiaki Narusue; Hiroyuki Morikawa (ICC, 2019)