@inproceedings{Walter:2009Na,
  author = "Walter, Roland",
  title = "{Non-thermal hard X-ray emission from M87}",
  doi = "10.22323/1.067.0062",
  booktitle = "Proceedings of 7th INTEGRAL Workshop  {\textemdash} PoS(Integral08)",
  year = 2009,
  volume = "067",
  pages = "062"
}