Hypermedia for spoken language education. - Kiyokata Katoh; Takako Ayusawa; Yukihiro Nishinuma; Richard Harrison; Kikuko Yamashita (ICSLP, 1994)

Perception of tonal accent by americans learning Japanese. - Yukihiro Nishinuma; Masako Arai; Takako Ayusawa (ICSLP, 1996)