Karez Namiq Kakarash, and Vian Afan Naqshbandi. “Comparison Between the Effectiveness of McKenzie Extension Exercises and William Flexion Exercises for Treatment of Acute or Sub-Acute Low Back Pain”. Journal of Population Therapeutics and Clinical Pharmacology 30, no. 8 (April 18, 2023): 123–133. Accessed November 18, 2024. https://mail.jptcp.com/index.php/jptcp/article/view/1651.