Jatav, V.S., Meena, S.R., Jelia, S., Jain, P., Ajmera, D., Agarwal, V., Dayma, C.L. and Arif, M. 2017. Echocardiographic findings in chronic obstructive pulmonary disease and correlation of right ventricular dysfunction with disease severity. International Journal of Advances in Medicine. 4, 2 (Mar. 2017), 476–480. DOI:https://doi.org/10.18203/2349-3933.ijam20171045.