Junichi Yamagishi, Koji Onishi, Takashi Masuko, Takao Kobayashi,
“Modeling of various speaking styles and emotions for HMM-based speech synthesis”
Proc. EUROSPEECH '03, vol.III, pp.2461-2464, September 2003.

Junichi Yamagishi, Takashi Masuko, Keiichi Tokuda, Takao Kobayashi,
“A training method for average voice model based on shared decision tree context clustering and speaker adaptive training”
Proc. ICASSP 2003, vol.I, pp.716-719, April 2003.

Junichi Yamagishi, Masatsune Tamura, Takashi Masuko, Keiichi Tokuda, Takao Kobayashi,
“A context clustering technique for average voice model in HMM-based speech synthesis”
Proc. ICSLP 2002, vol.1, pp.133-136, September 2002.