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    • Open access

      On extreme geomagnetic storms 

      Cid Tortuero, ConsueloUniversity of Alcalá Author; Palacios Hernández, JudithUniversity of Alcalá Author; Saiz Villanueva, María ElenaUniversity of Alcalá Author; Guerrero Ortega, AntonioUniversity of Alcalá Author; Cerrato Montalbán, YolandaUniversity of Alcalá Author (2014-09-13)