Gonçalves, D. R. P., & Rocha, C. H. (2016). Indicators of water quality and land usage patterns in watersheds in the state of Paraná, Brazil. Pesquisa Agropecuaria Brasileira, 51(9), 1172–1183. https://doi.org/10.1590/S1678-3921.pab2016.v51.22142