"Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory" . . "Astroparticle Physics" . . . . "0.045"^^ . "u.yV7bNrUNB+XgqBFDpfQTSX7Ks=" . "2.385"^^ . "61.604"^^ . "http://www.isvav.cz/h12/resultDetail.do?rowId=RIV%2F00216208%3A11320%2F09%3A00206975!RIV10-MSM-11320___"^^ . "J_imp \u010Dl\u00E1nek v impaktovan\u00E9m \u010Dasopise" . . . . "2.8"^^ . . "52.462"^^ . . "RIV/00216208:11320/09:00206975!RIV10-MSM-11320___" . . .