Sofian-Azirun, M. 1994. “Studies on the Acid Phosphatase Activity of the Diamondback Moth, Plutella Xylostella (L) (Lepidoptera: Plutellidae)”. Malaysian Journal of Science 15 (1&2):23-29. https://samudera.um.edu.my/index.php/MJS/article/view/4741.