M. Sompornrattanaphan, T. Thongngarm, P. Tantilipikorn, P. Kreetapirom, and J. Foo, “The Contribution of Outdoor Fine Particulate Matter to Indoor Air Quality in Bangkok Metropolitan Region, Thailand – Are Indoor Dwellers Safe?”, Siriraj Med J, vol. 70, no. 4, pp. 265–271, Nov. 2018.