Yimpoolsap, S., N. Hungspreug, and B. Anurugsa. “The Effects of Paraquat Used in Upland Rice and Maize Fields on Biomass of Attached Algae”. Science & Technology Asia, vol. 19, no. 1, Mar. 2014, pp. 32-38, https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/17072.