Bima Aminul Karim 2020. Respiratory muscle stretch gymnastics (RMSG) and pursed lip breathing exercise (PLB) on increasing forced expiratory volume 1 (FEV1) on patients of chronic obstructive pulmonary disease . International Journal of Allied Medical Sciences and Clinical Research. 8, 3 (Aug. 2020), 547–557. DOI:https://doi.org/10.61096/ijamscr.v8.iss3.2020.547-557.