1. Canal De Isabel II (2003) Manual de Abastecimiento del Canal de Isabel II. Madrid, March 2003
2. Cancelliere A, Bonaccorso B, Cavallaro L, Rossi G (2005) Regional Drought Identification Module REDIM. Extended Version 2005.1. Reference Guide. University of Catania, October 2005.
3. DMG 2006 European Commission– EuropeAid Co-operation Office, Euro-Mediterranean Regional Programme For Local Water Management, Mediterranean Drought Preparedness and Mitigation Planning (Medroplan). Drought Management Guidelines. November 2006.
4. Palmer W C (1965) Research Paper No. 45. Meteorological Drought. U.S. Department of Commerce, Weather Bureau. Washington D.C.
5. Tsakiris (2004) Guidelines for Using Annual RDI. Laboratory of Reclamation Works & Water Resources Management. National University of Athens.