ARCHANA SING, and G.D.VISHNU VARDHAN. “Effect of Postural Correction on Dyspnea Index and Pulmonary Functions in Chronic Obstructive Pulmonary Disease Patients”. International Journal of Pharma and Bio Sciences, vol. 8, no. 2, June 2017, pp. 505-11, doi:10.22376/ijpbs.2017.8.2.b505-511.