@article{Guerrero:1184,
      author        = "Guerrero, A. and Cid, C. and Cerrato, Y. and Saiz, E. and
                       Palacios, J. and Seaton, D.B.",
      title         = "{Geoeffectiveness of two CMEs interacting with the same
                       CH}",
      year          = "2012",
}