What can we learn from high energy flares in the Fermi sample of FSRQs : from a case study to dozens of objectsLuigi Pacciani, Fabrizio Tavecchio, Immacolata Donnarumma and Antonio StamerraEPJ Web of Conferences, 61 (2013) 04004DOI: https://doi.org/10.1051/epjconf/20136104004