Roy, R. R., K. M. Shamim, P. Saha, and M. A. Yusuf. “Frequencies of Different Morphological Types and Clinical Presentation of Atrial Septal Defect (ASD) Undergoing Surgical Repair in Bangladesh”. Journal of Current and Advance Medical Research, vol. 3, no. 1, Aug. 2016, pp. 6-9, doi:10.3329/jcamr.v3i1.29359.