The perception of morae in long vowels comparison among Japanese, Korean and English speakers. - Ryoji Baba; Kaori Omuro; Hiromitsu Miyazono; Tsuyoshi Usagawa; Masahiko Higuchi (ICSLP, 1996)

The perception of the morae with devocalized vowels in Japanese language. - Kimiko Yamakawa; Ryoji Baba (ICSLP, 1998)

The phonetic value of the devocalized vowel in Japanese - in case of velar plosive. - Kimiko Yamakawa; Hiromitsu Miyazono; Ryoji Baba (INTERSPEECH, 2000)