Luiz, T. B. P., and J. L. S. da Silva. “CHARACTERIZATION OF HYDROGEOCHEMICAL PROCESSES IN GROUNDWATER OF SANTA MARIA AQUIFER SYSTEM, IN THE CENTRAL REGION OF RIO GRANDE DO SUL”. Ciência E Natura, vol. 39, no. 2, May 2017, pp. 308-19, doi:10.5902/2179460X25911.