Khosa, JA, and AB (Sebastian) van As. “Unilateral Congenital Nasal Pyriform Aperture Stenosis and Unilateral Choanal Atresia – a Novel Finding: A Case Report”. South African Medical Journal 112, no. 11b (November 17, 2022): 931–932. Accessed April 18, 2026. https://samajournals.co.za/index.php/samj/article/view/478.