D.ANANDHI, P.DEEKSHITHA, and V.P.R.SIVAKUMAR. “Immediate Effect of Proprioceptive Neuromuscular Facilitation (PNF) of Respiratory Muscles on Pulmonary Function in Collegiate Students”. International Journal of Pharma and Bio Sciences 8, no. 4 (December 31, 2017): 508–512. Accessed July 23, 2026. https://ijpbs.net/index.php/journal/article/view/6290.