Chaijaroonkhanarak, Wunnee, Malee Buranarugsa, Jariya Umka, and Malivalaya Namking. 2013. “Sacralization of the 5th Lumbar Vertebra in Thais”. Srinagarind Medical Journal 21 (3):194-99. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13217.