by Kodera, Kazuoki, Akai, Sadayasu, Demizu, Miyuki, Hirota, Eiko, Miura, Masami, Yabe, Susumu
Published in AUDIOLOGY JAPAN (1992)

by Ohira, Yasuyuki, Kodera, Kazuoki, Akai, Sadayasu, Yajima, Katsuaki
Published in Otology Japan (20.12.1991)

by Akai, S, Kaga, K, Tanaka, Y
Published in No to hattatsu (01.01.1984)

by KODERA, KAZUOKI, AKAI, SADAYASU, HIROTA, EIKO, MIURA, MASAYOSHI, YABE, SUSUMU
Published in Nippon Jibi Inkoka Gakkai Kaiho (1993)

by AKAI, SADAYASU
Published in Audiology Japan (1986)

by AKAI, SADAYASU
Published in Audiology Japan (1989)

by AKAI, SADAYASU, KAGA, KIMITAKA, TANAKA, YOSHISATO, Suzuki, J.
Published in Nippon Jibiinkoka Gakkai Kaiho (20.11.1982)