@article{fraga_fernandes_pacheco_reis_moura_2013,  title={Exploratory assessment of groundwater vulnerability to pollution in the Sordo River Basin, Northeast of Portugal},  volume={66},  ISSN={0370-4467},  url={https://doi.org/10.1590/S0370-44672013000100007},  DOI={10.1590/S0370-44672013000100007},  number={1},  journal={Rem: Revista Escola de Minas},  publisher={Escola de Minas},  author={Fraga, Cátia Marisa and Fernandes, Luís Filipe Sanches and Pacheco, Fernando António Leal and Reis, Cristina and Moura, João Paulo},  year={2013},  month={Jan},  pages={49–58} }