Murat Arer, I., M. Kus, N. Akkapulu, A. Akdur, T. Avci, A. Sakulen Hargura, and H. Yabanoglu. “Retrospective Cohort Study of Elderly Patients With Acute Appendicitis”. Annals of Medical Research, vol. 24, no. 4, May 2021, pp. 0404-8, http://www.annalsmedres.org/index.php/aomr/article/view/1590.