Brangi, M.L., Mannai, C., Testa, M. and Uras, G. 2010. Assessment of groundwater vulnerability to nitrate contamination in the surficial aquifer of the rio Cixerri Plain (south Sardinia, Italy). Italian journal of engineering geology and environment. 1 (Jun. 2010), 23–33. DOI:https://doi.org/10.4408/IJEGE.2010-01.O-02.