Yang, Kai, Xiang-Yi Zheng, Yan-Li Wang, and Kui Zhao. “Alpha-Fetoprotein and Carbohydrate Antigen 19-9 Producing Advanced Adenocarcinoma of Renal Pelvis and Ureter”. Canadian Urological Association Journal 7, no. 11-12 (November 8, 2013): e750–3. Accessed May 4, 2024. https://cuaj.ca/index.php/journal/article/view/1544.