Aharonian, F., Akhperjanian, A., de Almeida, U. B., Bazer-Bachi, A., Behera, B., Beilicke, M., …Zech, A. (2007). New constraints on the mid-IR EBL from the HESS discovery of VHE gamma-rays from 1ES 0229+200. Astronomy & Astrophysics, 475(2), L9-L13. https://doi.org/10.1051/0004-6361%3A20078462