Göktuğ Şirin, and Seher Şirin. “Functional Constipation As a Neglected Condition in Laryngectomized Patients”. Turkish Journal of Gastroenterology, vol. 31, no. 2, Mar. 2020, pp. 120-7, https://tjg.avesjournals.com/index.php/tjg/article/view/3853.