U. Rompsaithong, P. Amarttayakong, J. Kanpittaya, A. Chaiyamoon, and S. Sangkhano, “Retroaortic left renal vein and its new Variations: Triple retroaortic and circumiliac left renal veins”, Asia Pac J Sci Technol, vol. 27, no. 05, pp. APST–27, Sep. 2022.