How many phonologies are there in one speaker? some experimental evidence. - Michael S. Ziolkowski; Mayumi Usami; Karen L. Landahl; Brenda K. Tunnock (ICSLP, 1992)

Proposal of Driving Support Agent Which Speak Based on Politeness Theory. - Tomoki Miyamoto; Daisuke Katagami; Yuka Shigemitsu; Mayumi Usami; Takahiro Tanaka; Hitoshi Kanamori; Yuki Yoshihara; Kazuhiro Fujikake (HCI (31), 2019)

A Politeness Control Method for Conversational Agents Considering Social Relationships with Users. - Tomoki Miyamoto; Daisuke Katagami; Mayumi Usami (JSAI, 2020)