Kumar, T.; Verma, D.; Singh, S.; Bajpai, M.; Srivastava, A.; Rao, A.; Haque, S.; Gautam, P. A Comparative Assessment of Hand Grip Exercise and 6-Minute Walk Test in Chronic Obstructive Pulmonary Disease Patients. Int J Res Med Sci 2024, 12, 3768-3778.