J. Leite Tavares, A. L. Araújo Calado, and R. F. Carelli Fontes, “INITIAL STUDIES TO USE THE INDEX TRIX FOR ANALYSIS OF EUTROPHICATION IN ESTUARY POTENGI RIVER - NATAL – RN – BRAZIL”, Rev. AIDIS ing. cienc. ambient., vol. 7, no. 3, pp. 297–308, Dec. 2014.