SOYUER, Işın, et al. “Endoscopic Biopsy and Imprint Cytology in the Diagnosis of Gastrointestinal Tract Lesions”. Turkish Journal of Gastroenterology, vol. 9, no. 3, Jan. 1998, pp. 229-34, https://turkjgastroenterol.org/index.php/tjg/article/view/896.