Proklamartina, N., R. Prakoso, O. Lilyasari, R. Ariani, S. Siagian, and A. Soesanto. “Pulmonary Doppler Notch Pattern in Relation With Pulmonary Vascular Resistance Index in Patients With Atrial Septal Defect”. Indonesian Journal of Cardiology, Vol. 41, no. 3, Mar. 2021, doi:10.30701/ijc.1053.