Kamolsawat, S., V. Hiengkaew, C. Akamanon, N. Poungvarin, and M. S. Bryant. “Influence of Levodopa Therapy on Static Balance in Parkinson’s Disease”. Archives of Allied Health Sciences, vol. 26, no. 1, Apr. 2014, pp. 93-102, https://he01.tci-thaijo.org/index.php/ams/article/view/66353.