S. Itahashi and C. Tseng, ``Computer processing of Asian spoken languages,'' Consideration Books, ISBN 978-0-935047-72-1, April 2010. (H. Kawahara, M. Morise, T. Takahashi, R. Nisimura, H. Banno and T. Irino, ``STRAIGHT, a framework for speech analysis, modification and synthesis,'' pp.297-300, を担当.)