Zakir, A., M. Ikram, and S. S. ur Rehman. “Comparison of Thera-Band, Co-Contraction and Isometric Exercises in Patients With Chronic Frozen Shoulder”. Pakistan Journal of Rehabilitation, vol. 11, no. 1, Jan. 2022, pp. 145-54, http://ojs.zu.edu.pk/ojs/index.php/pjr/article/view/1383.