Muhammad, U. A., Tham, L. G., Perumal, N., Daud, H. M., Yasid, N. A. and Shukor, M. Y. (2016) “Assay for heavy metals using an inhibitive assay based on the acetylcholinesterase from Clarias batrachus”, Bioremediation Science and Technology Research (e-ISSN 2289-5892), 4(2), pp. 6–10. doi: 10.54987/bstr.v4i2.369.