Qamar, Muhammad Mustafa, et al. “Comparison of the Effects of Conventional Physical Therapy Versus Progressive Overload Training in Patients With Shoulder Impingement Syndrome; A Randomised Clinical Trial”. 2023. Annals of King Edward Medical University, vol. 29, no. 1, July 2023, pp. 50-54, doi:10.21649/akemu.v29i1.5395.