Fermi Large Area Telescope observations of the active galaxy 4C +55.17 : steady, hard gamma-ray emission and its implications
author:
McConville W., Ostorero L., Moderski R., Stawarz Łukasz , Cheung C. C., Ajello M., Bouvier A., Bregeon J., Donato D., Finke J., Furniss A., McEnery J. E., Monzani M. E., Orienti M., Reyes L. C., Rossetti A., Williams D. A.