@inproceedings{Velinov:2019b7,
  author = "Velinov, Peter I. Y.  and  Mishev, Alexander",
  title = "{Ionization Effect in Atmosphere During Several Halloween GLE events of October-November 2003}",
  doi = "10.22323/1.358.1167",
  booktitle = "Proceedings of 36th International Cosmic Ray Conference {\textemdash} PoS(ICRC2019)",
  year = 2019,
  volume = "358",
  pages = "1167"
}