author        = "Cebrian,  S. and Rodriguez, A. and Kuster, M. and Beltran,
                       B. and Gomez, H. and Hartmann, R. and Irastorza, I. G. and
                       Kotthaus, R. and Luzon, G. and Morales, J. and Ruz, J. and
                       Struder, L. and Villar, J. A.",
      title         = "{Background study for the PN-Ccd detector of CERN Axion
                       Solar Telescope}",
      year          = "2007",