Bandhukul, A., and O. Mookdadilok. “Proposal for Thailand Physician Requirement Projection Model Frame Based on Occupational and Envi-Ronmental Medicine Competencies”. Journal of Health Science of Thailand, vol. 26, no. 3, Oct. 2017, pp. 602-9, https://thaidj.org/index.php/JHS/article/view/67.