L.K, Chai, Norhayati Mohd Tahir, and Hansen H.C.B. “Improved Method for the Determination of Cypermethrin in Sarawak Soils”. Malaysian Journal of Science 26, no. 1 (April 26, 2007): 109–117. Accessed November 16, 2024. http://ojie.um.edu.my/index.php/MJS/article/view/8047.