Rao, K R S Sambasiva, et al. “COMPARATIVE EVALUATION OF TOXICITY OF ELSAN IN CONTINUOUS FLOW AND STATIC SYSTEMS WITH REFERENCE TO OXYGEN CONSUMPTION AND EXCRETION IN OPHIOCEPHALUS PUNCTATUS (BLOCH)”. Indian Journal of Fisheries, vol. 28, no. 1 & 2, Nov. 2011, pp. 254-8, https://epubs.icar.org.in/index.php/IJF/article/view/11949.