Abeysinghe, N. M. DE. A., and M. B. Samarakoon. “Analysis of Variation of Water Quality in Kelani River, Sri Lanka.” International Journal of Environment, Agriculture and Biotechnology, vol. 2, no. 6, 2017, pp. 2770–75. Crossref, https://doi.org/10.22161/ijeab/2.6.1.