ATEŞ, K. Bahri, A. Remzi DALAY, Sedat BOYACIOĞLU, M. Emin CANER, M. Enver DOLAR, Fatih HİLMİOĞLU, and Burhan ŞAHİN. 1992. “Upper Gastrointestinal Fiberoptic Endoscopic Experience in Turkey”. Turkish Journal of Gastroenterology 3 (3):563-65. https://www.turkjgastroenterol.org/index.php/tjg/article/view/159.