Kaladharan, P, et al. “INHIBITION OF PRIMARY PRODUCTION AS INDUCED BY HEAVY METAL IONS ON PHYTOPLANKTON POPULATION OFF COCHIN”. Indian Journal of Fisheries, vol. 37, no. 1, Sept. 2011, pp. 51-54, https://epubs.icar.org.in/index.php/IJF/article/view/10426.