Patummasut, M., N. Phewchean, and J. Sirirattanapa. “Modelling Motorcycle-Related Head Injury Trends for Thailand Following the 100% Motorcycle Helmet Use Campaign Using”. Thailand Statistician, vol. 17, no. 1, Dec. 2018, pp. 30-40, https://ph02.tci-thaijo.org/index.php/thaistat/article/view/163183.