@article{Kapanadze:20174O,
  author = "Kapanadze, Bidzina  and  Kapanadze, Sergo  and  Romano, Patrizia  and  Vercellone, Stefano  and  Tabagari, Lela",
  title = "{Unprecedented X-ray Flaring Activity of Mrk 421 in 2013 April}",
  doi = "10.22323/1.269.0033",
  journal = "PoS",
  year = 2017,
  volume = "FRAPWS2016",
  pages = "033"
}