Wahyuni, W, and Nur Agung Martopo. “The Effect of Highly Challenging Balance Training on Balance in Parkinson’s Sufferers: Critical Review”. Urecol Journal. Part D: Applied Sciences 2, no. 1 (June 23, 2022): 11–19. Accessed May 3, 2024. https://e-journal.urecol.org/index.php/ujas/article/view/160.