A four layer sharing HMM system for very large vocabulary isolated word recognition. - Ruxin Chen; Miyuki Tanaka; Duanpei Wu; Lex Olorenshaw; Mariscela Amador (ICSLP, 1998)

A robust speech detection algorithm for speech activated hands-free applications. - Duanpei Wu; Miyuki Tanaka; Ruxin Chen; Lex Olorenshaw; Mariscela Amador; Xavier Menéndez-Pidal (ICASSP, 1999)

Speech and word detection algorithms for hands-free applications. - Duanpei Wu; Xavier Menéndez-Pidal; Lex Olorenshaw; Ruxin Chen; Mick Tanaka; Mariscela Amador (INTERSPEECH, 2000)