Speech coding activities within CCITT: Status and trends. - Xavier Maitre; T. Aoyama (ICASSP, 1982)

Software and Data Structure for Multi-Processor Digital Switching System. - T. Aoyama; R. Fukusato; M. Hiraiwa (ICC (1), 1984)

Implementation of a new type DSP PLL using high performance DSP DSSP-1. - Shinji Ono; T. Aoyama; Masafumi Hagiwara; Masao Nakagawa (ICASSP, 1986)