Relativistic plasmas in AGN jets - From synchrotron radiation to γ-ray emission Giovanni La Mura, Giovanni Busetto, Stefano Ciroi, Piero Rafanelli, Marco Berton, Enrico Congiu, Valentina Cracco and Michele Frezzato Eur. Phys. J. D, 71 4 (2017) 95 Published online: 18 April 2017 DOI: 10.1140/epjd/e2017-70745-2