Sonkaya, Zeynep Zeliha, Mustafa Ceylan, and Ali Rıza Sonkaya. “Speech Characteristics of Parkinson Disease”. Medical Science and Discovery 8, no. 12 (December 27, 2021): 666–670. Accessed August 16, 2022. https://medscidiscovery.com/index.php/msd/article/view/645.