@article{Tkachenko:20211/,
  author = "Tkachenko, Olena  and  Engel, Ralph  and  Ulrich, Ralf  and  Unger, Michael",
  title = "{Study on the Combined Estimate of the Cosmic-Ray Composition and Particle Cross Sections at Ultrahigh Energies}",
  doi = "10.22323/1.395.0438",
  journal = "PoS",
  year = 2021,
  volume = "ICRC2021",
  pages = "438"
}