Batool, F., F. Muaaz, K. Tariq, and N. Sarfraz. “Relationship of Chronic LBP (Low Back Pain) With Hamstring Tightness in Professionals”. Journal of Liaquat University of Medical & Health Sciences, vol. 18, no. 03, Oct. 2019, pp. 236-40, http://121.52.154.205/index.php/jlumhs/article/view/184.