H. Liang, and J. Dines. Proceedings of the 12th Annual Conference of the International Speech Communication Association (INTERSPEECH), page 1825-1828. (August 2011)
Y. Liang, S. Ke, J. Zhang, X. Yi, and Y. Zheng. Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence, International Joint Conferences on Artificial Intelligence Organization, (July 2018)