V. Gökbulut, M. Kaplan, S. Kaçar, M. Akdoğan Kayhan, O. Coşkun, and E. Kayaçetin, “Bezoar in upper gastrointestinal endoscopy: A single center experience”, Turkish Journal of Gastroenterology, vol. 31, no. 2, pp. 85–90, Jan. 2020.