@inproceedings{Yushkov:2016DN,
  author = "Yushkov, Alexey",
  title = "{Composition at the ``ankle'' measured by the Pierre Auger Observatory: pure or mixed? }",
  doi = "10.22323/1.236.0335",
  booktitle = "Proceedings of The 34th International Cosmic Ray Conference {\textemdash} PoS(ICRC2015)",
  year = 2016,
  volume = "236",
  pages = "335"
}