Fatema, N., H. Rashid, and A. Azad. “Device Closure of Perimembranous Ventricular Septal Defect Under Deep Sedation and Transthoracic Echo Guide: A Case Report”. Cardiovascular Journal, vol. 3, no. 1, Nov. 2010, pp. 89-91, doi:10.3329/cardio.v3i1.6432.