R., K. ., V. . Velkumar, and S. . E. “Effectiveness of Retro Walking Exercise Versus Core Stability Exercise for Coastal Patients With Osteoarthritis of the Knee – A Randomized Active Control Study”. Journal of Coastal Life Medicine, vol. 11, no. 1, Jan. 2023, pp. 2452-61, https://www.jclmm.com/index.php/journal/article/view/703.