Madiyono, B., Achmad, J., Sastroasmoro, S., Oesman, I. N. and Putra, S. T. (1996) “Clinical features and management of secundum atrial septal defect in infants and children”, Medical Journal of Indonesia, 5(1), pp. 42-8. doi: 10.13181/mji.v5i1.844.