Thagadur, S. C., H. Seenappa, A. H. Shantappa, and A. K. P. “A Comparative Study Between Quadriceps Combined With Hip Abductor Strengthening Versus Quadriceps Strengthening in Treating Osteoarthritis of Knee: A Short Term Pilot Study”. International Journal of Health and Clinical Research, vol. 4, no. 8, Apr. 2021, pp. 155-9, https://www.ijhcr.com/index.php/ijhcr/article/view/1435.