Hadiqa Adnan, Misbah Ghous, Syed Shakil Ur Rehman, and Irum Yaqoob. “The Effects of a Static Exercise Program Verses Swiss Ball Training for Core Muscles of the Lower Back and Pelvic Region in Patients With Low Back Pain After Child Delivery. A Single Blind Randomized Control Trial”. Journal of the Pakistan Medical Association, vol. 71, no. 4, Feb. 2021, pp. 1058-62, doi:10.47391/JPMA.784.