@article{Tramacere:2010ki,
  author = "Tramacere, Andrea",
  title = "{The giant X-ray flares of Mrk 421 }",
  doi = "10.22323/1.096.0039",
  journal = "PoS",
  year = 2010,
  volume = "extremesky2009",
  pages = "039"
}