Dey, P. K. ., M. Bhowmik, S. K. . Kar, and S. K. . Gain. “Diffusing Capacity of Lung for Carbon Monoxide (DLCO) in Evaluation of Lung Function”. Chest &Amp; Heart Journal, vol. 44, no. 1, Nov. 2021, pp. 43-47, https://banglajol.info/index.php/CHJ/article/view/56382.