Muhammad Younas, Ahsan Beg, Tauseef Asma, and Baqir Maqbool. “Experience of Transcatheter Device Closure of Atrial Septal Defect in a Tertiary Care Institute”. Journal of the Pakistan Medical Association, vol. 71, no. 7, Dec. 2021, pp. 1776-9, doi:10.47391/JPMA.1362.