Pimpasaeng, C., and S. Chaiklieng. “Exposure to benzene among workers in gasoline stations: a case study in Khon Kaen municipality, Muang Khon Kaen”. Asia-Pacific Journal of Science and Technology, vol. 19, no. 2, Apr. 2017, pp. 354-61, https://so01.tci-thaijo.org/index.php/APST/article/view/82944.