Küçukosmanoğlu, Osman, et al. “Congenital Double-Orifice Mitral Valve Associated With Atrioventricular Septal Defect: A Case Report”. The Turkish Journal of Pediatrics, vol. 44, no. 2, Apr. 2002, pp. 160-1, https://turkjpediatr.org/article/view/2962.