@article{Petrov:20214h,
  author = "Petrov, Igor  and  Knurenko, Stanislav",
  title = "{On the nature of particles that produces extensive air showers with energy greater than 5 EeV}",
  doi = "10.22323/1.395.0290",
  journal = "PoS",
  year = 2021,
  volume = "ICRC2021",
  pages = "290"
}