1. Aller L, Bennet T, Lehr JH, Petty RI, Hackett G (1987) DRASTIC: a standarized system for evaluating groundwater pollution potential using hydrogeologic settings. United States Environmental Protection Agency. Report EPA/600/2-87/035, p 643
2. Andreo B, Goldscheider N, Vadillo I, Vías JM, Neukum C, Sinreich M, Jiménez P, Brechenmacher J, Carrasco F, Hötzl H, Perles MJ, Zwahlen F (2006) Karst groundwater protection: first application of a Pan-European approach to vulnerability, hazard and risk mapping in the Sierra de Líbar (Southern Spain). Sci Total Environ 357(1–3):54–73
3. CEDEX (2004a) Selección preliminar de posibles tramos fluviales en la red de referencia (A preliminary selection of the possible fluvial stretches in the reference net). Centro de Estudios Hidrográficos del CEDEX, Madrid
4. CEDEX (2004b) Tipología de ríos (River typology). Centro de Estudios Hidrográficos del CEDEX, Madrid
5. Civita M (1994) Le carte della vulnerabilità degli acquiferi all´inquinamiento. Studi sulla vulnerabilità degli acquiferi (Map of aquifers’ vulnerability to pollution. Aquifers’ vulnerability study). Pitagora Editrice, Bolonia, p 325