Musab D Hassan, Dalia Mursi Abdelhalim, Abdelrahim Mohamed Elhussein, Isam M Elkhidir, and Khalid A Enan, “Molecular Detection of SV40, BKV and JCV in Esophageal and Colorectal cancer Patients in Khartoum State, Sudan”, GJMR, vol. 20, no. C4, pp. 5–11, Jul. 2020.