Siva Jyothi, N, P Senthil Selvam, Md. Ahmedullah, Kumar G Yatheendra, S S Subramanian, and Jibi Paul. “Effectiveness of PNF Stretch of Pectoralis Major Muscle on Pulmonary Function in COPD Patients”. International journal of health sciences 6, no. S1 (May 31, 2022): 13332–13341. Accessed April 29, 2026. https://sciencescholar.us/journal/index.php/ijhs/article/view/8464.