Richard J. Morris

Vocal jitter in young adult and aged female voices

W. S. Brown, William S. Brown, John F. Michel, 1989 .

Voice onset time in aphasia, apraxia of speech and dysarthria: a review

Francis Eustache, Canan Ozsancak, Didier Hannequin, 2000 .

Age-related voice measures among adult women

W. S. Brown, William S. Brown, R. Morris, 1987 .

Differentiated electroglottograph and audio signal measurements of vocal fold closed quotient during a register change: Single note data

Shonda Bernadin, David Okerlund, R. Morris, 2015 .

Speaking fundamental frequency characteristics as a function of age and professional singing

Harry Hollien, W. S. Brown, William S. Brown, 1991 .

Select Acoustic and Perceptual Measures of Choral Formation

Christopher R. McCrea, Christopher Aspaas, R. Morris, 2004 .