Thuy, D. T., H. T. Cuong, D. D. Kim, and L. T. P. Quynh. “Variation in Microcytin Concentrations in Water Environment of the Hoan Kiem Lake”. Academia Journal of Biology, vol. 34, no. 1, Mar. 2012, pp. 94-98, doi:10.15625/0866-7160/v34n1.675.