@inproceedings{Ostapchenko2019,
  author    = {Sergey Ostapchenko},
  title     = {High energy cosmic ray interactions and UHECR composition problem},
  booktitle = {EPJ Web of Conferences},
  volume    = {210},
  number    = {Article Number: 02001},
  pages     = {1 -- 10},
  doi       = {10.1051/epjconf/201921002001},
  year      = {2019},
}