Ibrahim, Muhammad Imran, et al. “RETRO-AORTIC LEFT RENAL VEIN AS A CAUSE OF UNILATERAL DENSE PERSISTENT NEPHROGRAM: Unilateral Dense Persistent Nephrogram”. Pakistan Armed Forces Medical Journal, vol. 65, no. 6, Dec. 2015, pp. 849-50, https://pafmj.org/PAFMJ/article/view/1204.