Gursul, S., N. Iflazoglu, K. Karabulut, and M. Sarac. “Parameters Associated With Survival in Patients Undergoing Surgical Treatment Due to Rectal Cancer”. Annals of Medical Research, vol. 26, no. 5, May 2021, pp. 0837-44, http://www.annalsmedres.org/index.php/aomr/article/view/1193.