HARDIK ANADKAT, et al. “Effectiveness Of Retro Walking Treadmill Training On Pain And Disability In Knee Osteoarthritis: A Randomized Controlled Trail”. International Journal of Pharma and Bio Sciences, vol. 6, no. 4, Dec. 2015, pp. 43-50, https://ijpbs.net/index.php/journal/article/view/4676.