Gonçalves, Daniel Ruiz Potma, and Carlos Hugo Rocha. 2016. “Indicators of Water Quality and Land Usage Patterns in Watersheds in the State of Paraná, Brazil”. Pesquisa Agropecuaria Brasileira 51 (9):1172-83. https://doi.org/10.1590/S1678-3921.pab2016.v51.22142.