@inproceedings{Sotirov:2024ai,
  author = "Sotirov, Simon",
  title = "{General constraints on sources of high energy cosmic rays. Updated Hillas diagrams.}",
  doi = "10.22323/1.455.0024",
  booktitle = "Proceedings of International Conference  on  Particle Physics and Cosmology {\textemdash} PoS(ICPPCRubakov2023)",
  year = 2024,
  volume = "455",
  pages = "024"
}