Analysis and recognition of isolated putonghua vowels by Karhunen-Loève transformation techniques. - Lester C. M. Chan; Paul Y. S. Cheung (Speech Commun., 1986)

Speaker-independent putonghua finals recognition using phonemic labeling and vector quantization with hidden Markov models. - Lester C. M. Chan; Paul Y. S. Cheung (ECST, 1987)