@Article{ Colaboración_GONZÁLEZ:155-168,

author = { Http://Www.Auger.Org Colaboración Pierre Auger- and JAVIER GONZÁLEZ TABOADA } ,

title = { AN UPPER LIMIT TO THE PHOTON FRACTION IN COSMIC RAYS ABOVE 10**19-EV FROM THE PIERRE AUGER OBSERVATORY. },

journal = { Astroparticle physics (Print) },

year = { 2007 },

volume = { 27 },

pages = { 155-168 },

}