Soontrapa, Suppasin, Prathana Chowchuen, Jiraporn Srinakarin, and Sukree Soontrapa. “Diagnostic Reliability of the Singh index: Femoral Neck Osteoporosis”. Srinagarind Medical Journal 19, no. 4 (November 25, 2013): 215–219. accessed September 16, 2026. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/14555.