İZBUL, Tarık, and Minel AKALIN. “The Evaluation of Diagnostic Rectosigmoidoscopic Examinations in Turkish Republic of Northern Cyprus”. Turkish Journal of Gastroenterology, vol. 10, no. 3, Jan. 1999, pp. 268-71, https://www.turkjgastroenterol.org/index.php/tjg/article/view/1000.