1. Physiological differences between the trained and untrained speaking and singing voice;Brown;J Voice,1988
2. Respiratory kinematics in classical (opera) singers;Watson;J Speech Hear Res,1985
3. The science of the singing voice;Sundberg,1987
4. The effect of voice training on lung volume in singers and the possible relationship to the damping factor of Pressman;Gould;J Res Singing,1977
5. Differences in spectral analyses of a trained and an untrained singer;Shutte;NATS Bull,1983