1.
Yildirim SV, Gümüş A, Coşkun I, Türköz R. Quadricuspid aortic valve: a rare cause of aortic regurgitation and stenosis. Turk J Pediatr. 2008;50(5):500-502. Accessed April 27, 2026. https://turkjpediatr.org/article/view/2477