Characterizing the subjective performance of the ITU-T 8 kb/s speech coding algorithm-ITU-T G.729. - Mark E. Perkins; Keith Evans; Dominique Pascal; Leigh A. Thorpe (IEEE Commun. Mag., 1997)

Subjective evaluation of speech compression codecs and other non-linear voice-path devices for telephony applications. - Leigh A. Thorpe (Int. J. Speech Technol., 1999)