Ruyunyong, R. and Kamtuo, A. (2014) “Operational Security of the Northeast Queen Sirikit Heart Center, Khon Kaen University”, Srinagarind Medical Journal, 29(4), pp. 383–388. available at: https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/21996 (accessed: 13 September 2026).