Tahan, Nahid, and Motahare Hashemi Brojerdi. “Effect of Pelvic Floor Muscle Contraction on Ultrasonographic Thickness of Abdominal Muscles”. Journal of Clinical Physiotherapy Research 3, no. 4 (March 5, 2019): 144–148. Accessed July 11, 2026. https://journals.sbmu.ac.ir/physiotherapy/article/view/23125.