Madiyono, Bambang, Ismet Oesman, Sudigdo Sastroasmoro, Sukman Putra, Eva Soelaeman, and Kukuh Rachmad. “Secundum Atrial Septal Defect Before and After Surgery”. Paediatrica Indonesiana 29, no. 9-10 (March 20, 2018): 199-208. Accessed April 25, 2024. https://paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/1855.