@inproceedings{Topchiev:20167U,
  author = "Topchiev, Nikolay",
  title = "{GAMMA-400 gamma-ray observatory}",
  doi = "10.22323/1.236.1026",
  booktitle = "Proceedings of The 34th International Cosmic Ray Conference {\textemdash} PoS(ICRC2015)",
  year = 2016,
  volume = "236",
  pages = "1026"
}