Cahyono, Agus, and Machrus A Rachman. “The Cause of Mortality Among Congenital Heart Disease Patients in Pediatric Ward, Soetomo General Hospital (2004-2006)”. Indonesian Journal of Cardiology, vol. 28, no. 4, June 2013, pp. 279-84, doi:10.30701/ijc.v28i4.231.