Bulbul, R. H., O. S. Khan, M. S. A. Sunny, S. R. Sarker, and M. Nuruzzaman. “Tissue Valve Replacement for Severe Calcified Pulmonary Stenosis: First Time in BSMMU”. University Heart Journal, vol. 9, no. 1, July 2014, pp. 54-55, doi:10.3329/uhj.v9i1.19514.