@inproceedings{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",
  booktitle = "Proceedings of Frontier Research in Astrophysics – II {\textemdash} PoS(FRAPWS2016)",
  year = 2017,
  volume = "269",
  pages = "033"
}