Singh, Dr. Khileshwar, Dr. D. Sudheer, Dr. S. K. Dwivedi, and Dr. Manish Goyal. 2017. “Efficacy of Chest Physiotherapy and Incentive Spirometry on Pulmonary Function in Post Operative Period After Abdominal Surgery; A Comparative Study”. International Journal of Innovative Research in Medical Science 2 (08):1240 to 1243. https://doi.org/10.23958/ijirms/vol02-i08/23.