1. Aller, L.T., Bennett, H. J. R., Lehr, R., Petty, J., Hackett, G. (1987). DRASTIC: A standardized system for evaluating ground water pollution potential using geo-hydrogeologic settings. US Environmental Protection Agency Report, EPA600/2-EP87/036.
2. Auge, M. (2004). Vulnerabilidad de Acuíferos: Conceptos y Métodos. E book: 1–38. RedIRIS. Red Académica y Científica de España en Internet. http://tierra.rediris.es/hidrored/ebooks/vulnerabilidad.html . Accessed 10 March 2007.
3. Brett, A. B. (2003). Physical environmental modeling, visualization and query for supporting landscape planning decisions. Landscape and Urban Planning, 65, 237–259.
4. Chowdary, V. M., Rao, N. H., & Sarma, P. B. S. (2005). Decision support framework for assessment of non-point-source pollution of groundwater in large irrigation projects. Agricultural Water Management, 75(3), 194–225.
5. Connell, L. D., & Daele, G. V. D. (2003). A quantitative approach to aquifer vulnerability mapping. Journal of Hydrology, 276(71), 88.