Ackermann, M Resolving the Extragalactic γ-Ray Background above 50 GeV with the Fermi Large Area Telescope. [electronic resource] - Physical review letters 04 2016 - 151105 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1079-7114 Standard No.: 10.1103/PhysRevLett.116.151105 doi