TY - RPRT TI - Blazar Gamma-Rays, Shock Acceleration, and the Extragalactic Background Light AU - Stecker, Floyd W. AU - Baring, Matthew G. AU - Summerlin, Errol J. PY - 2007 UR - https://ntrs.nasa.gov/citations/20080040779 ID - 20080040779 ER -