info:oai:www.ucm.es:34491info:ofi/fmt:xml:xsd:journalSousaP. M.Sousa, P. M.TrigoR. M.Trigo, R. M.AizpuruaP.Aizpurua, P.NietoR.Nieto, R.GimenoL.Gimeno, L.García HerreraRicardoGarcía Herrera, Ricardo11120111561-8633Trends and extremes of drought indices throughout the 20th century in the MediterraneanNatural hazards and earth system sciences33-51article