1. Some Properties of Speech Muscles and the Influence Thereof on Language;Kaiser;Arch. náerl. phon. expár.,1934
2. Relative Speed of Articulatory Movements;Hudgins;Arch. náerl. phon. expár.,1937
3. Norms for Maximum Repetitive Rates for Certain Sound Established With the Sylrater;Irwin;J. Speech & Hearing Disorders,1953
4. Speech and Language;Miller,1951