T. Tunsaringkarn, S. Soogarun, A. Rungsiyothin, K. Zapuang, and R. S. Chapman, “Health Status of Gasoline Station Workers in Pathumwan Area, Bangkok, Thailand, in 2004 and 2009”, J Health Res, vol. 25, no. 1, pp. 15–19, Mar. 2017.