Characteristics of nasalance in canadian speakers of English and French. - Herbert A. Leeper; A. P. Rochet; Ian R. A. MacKay (ICSLP, 1992)

On the estimation of signal-to-noise ratio in continuous speech for abnormal voices. - Vijay Parsa; Donald G. Jamieson; Karen Stenning; Herbert A. Leeper (INTERSPEECH, 2002)