Bilgiç, Arman, et al. “Transcatheter Closure of Secundum Atrial Septal Defects, a Ventricular Septal Defect, and a Patent Arterial Duct”. The Turkish Journal of Pediatrics, vol. 43, no. 1, Jan. 2001, pp. 12-18, https://doi.org/10.24953/turkjpediatr.2001.3009.