“Effect of Quadriceps Muscle Strengthening Exercise on Quadriceps and Hamstring Muscle Strength Ratio in Patients with Osteoarthritis Grade 2 and 3”, IJIHS, vol. 5, no. 2, pp. 64–69, Sep. 2017, Accessed: Jul. 16, 2026. Available: https://journal.fk.unpad.ac.id/index.php/ijihs/article/view/1041