@article{Petrov:2019JH,
  author = "Petrov, Igor  and  Knurenko, Stanislav",
  title = "{Second Knee in Cosmic Ray Spectrum at Energy $\sim$10$^{17}$ eV by Yakutsk Data}",
  doi = "10.22323/1.358.0384",
  journal = "PoS",
  year = 2019,
  volume = "ICRC2019",
  pages = "384"
}