Eziyi, A., O. Ojewuyi, N. El-Nahas, and A. Oyeniyi. “Xanthogranulomatous Pyelonephritis: A Retrospective Review of 21 Cases”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 24, no. 5, Nov. 2015, pp. 1-5, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/4438.