Abramowski, A., Aharonian, F., Ait Benkhali, F., Akhperjanian, A., Angüner, E., Anton, G., …Malyshev, D. (2014). Search for extended γ-ray emission around AGN with H.E.S.S. and Fermi-LAT. Astronomy & Astrophysics, 562, Article A145. https://doi.org/10.1051/0004-6361/201322510