Reconciling inverse-Compton Doppler factors with variability Doppler factors in blazar jets I. Liodakis, A. Zezas, E. Angelakis, T. Hovatta and V. Pavlidou A&A, 602 (2017) A104 Published online: 22 June 2017 DOI: 10.1051/0004-6361/201629902