Veingerl, Bojan. “Early Postoperative Serum Carcinoembryonic Antigen Levels in Patients Operated for Colorectal Carcinoma - a New Method for Following-up”. Radiology and Oncology 37, no. 2 (June 1, 2003). Accessed April 30, 2026. https://www.radioloncol.com/index.php/ro/article/view/1368.