Abas. M, R., N. Y. M. J. Omar, and M. J. Maah. “Chemical Characterization of Aerosols in a Malaysian Forested Area: Selai, Endau-Rompin Johor National Park”. Malaysian Journal of Science, vol. 24, no. 1, June 2005, pp. 73-81, https://samudera.um.edu.my/index.php/MJS/article/view/17167.