Helmy, Mazdar, Mulyadi Djer, Sudung Pardede, Darmawan Setyanto, Lily Rundjan, and Hikari Sjakti. 2013. “Comparison of Surgical Vs. Non-Surgical Closure Procedures for Secundum Atrial Septal Defect”. Paediatrica Indonesiana 53 (2), 108-16. https://doi.org/10.14238/pi53.2.2013.108-16.