Maximum Duration of Phonation 論文 Paul H. Ptacek・Eric K. Sander ·1963-05-01 ·『Journal of Speech and Hearing Disorders』 28(2) pp. 171-182 doi:10.1044/jshd.2802.171
Speech Characteristics of Patients with Parkinson’s Disease: I. Intensity, Pitch, and Duration 論文 Gerald J. Canter ·1963-08-01 ·『Journal of Speech and Hearing Disorders』 28(3) pp. 221-229 doi:10.1044/jshd.2803.221