Bima Aminul Karim, “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”, Int. J. of Allied Med. Sci. and Clin. Res., vol. 8, no. 3, pp. 547–557, Aug. 2020.