Djer, Mulyadi, Nikmah Idris, and Angelina Angelina. 2013. “Transcatheter Closure of Tubular Type Patent Ductus Arteriosus Using Amplatzer® Ductal Occluder II: A Case Report”. Paediatrica Indonesiana 53 (5), 291-4. https://doi.org/10.14238/pi53.5.2013.291-4.