On magnetic fields in broad-line blazars
  High energy spectra of broad-line blazars can be reproduced by both synchrotron-self-Compton (SSC) models and external-Compton (EC) models. However, as is known from numerical modeling, SSC scenarios require much weaker magnetic field than EC ones. In this paper we quantify these results analytically. 
R. Moderski, M. Sikora (CAMK, Warsaw)