Ekram, A. S., Hasan, A. S., Haque, M. M., Ahsanullah, A., Islam, Q. T., Azhar, M. A. and Islam, M. F. (2011) “A Comparative Study on the Occurrence of Cor Pulmonale among the Cases of COPD and Bronchial Asthma”, TAJ: Journal of Teachers Association, 14(2), pp. 56–60. doi: 10.3329/taj.v14i2.8386.