Collaboration, H., Abramowski, A., Aharonian, F., Ait Benkhali, F., Akhperjanian, A., Angüner, E., …Horan, D. (2015). The high-energy γ-ray emission of AP Librae. Astronomy & Astrophysics, 573, Article A31. https://doi.org/10.1051/0004-6361/201321436