1. Meteorological Data of Roxo Reservoir Station;ABROXO,2009
2. Export of nitrogen from catchments: a world-wide analysis;Alvarez-Cobelas;Environ. Pollut.,2008
3. Aman, M., 2004. Evaluating and comparing the performance of different irrigation systems using remote sensing and GIS: a case study in Alentejo region, Portugal. MSc Thesis. ITC, Enschede, The Netherlands.
4. Modelling nitrogen transport and retention in the catchments of southern Sweden;Arheimer;Ambio,1998
5. Nitrogen and phosphorus concentrations from agricultural catchments: influence of spatial and temporal variables;Arheimer;J. Hydrol.,2000