Localizing the γ-ray emitting region in the blazar TXS 2013+370 E. Traianou, T. P. Krichbaum, B. Boccardi, R. Angioni, B. Rani, J. Liu, E. Ros, U. Bach, K. V. Sokolovsky, M. M. Lisakov et al. (3 more) A&A, 634 (2020) A112 Published online: 19 February 2020 DOI: 10.1051/0004-6361/201935756