Hải, N.T., Hùng, N.V. and Hợp, N.V. 2019. Eutrophication concern: A case study on several lakes in Dong Ha city. Hue University Journal of Science: Natural Science. 128, 1C (Nov. 2019), 63-68. DOI:https://doi.org/10.26459/hueuni-jns.v128i1C.5450.