Using GMM for voiced/voiceless segmentation and tone decision in Mandarin continuous speech recognition. - Ching X. Xu (INTERSPEECH, 2000)

F0 perturbations by consonants and their implications on tone recognition. - Ching X. Xu; Yi Xu (ICASSP (1), 2003)

Phonetic realization of focus in English declarative intonation. - Yi Xu 007; Ching X. Xu (J. Phonetics, 2005)