Gunasekaran, Baskaran, Mohd Hakimi Mohd Kasim, Shamala Salvamani, and M.Y. Shukor. 2014. “Field Trials on Heavy Metals Using Alpha-Chymotryopsin Enzyme Assay”. Journal of Environmental Microbiology and Toxicology 2 (1):25-34. https://doi.org/10.54987/jemat.v2i1.90.