@article{8673,
  author = {Marek Sikora and J. Kirk and Mitchell Begelman and P. Schneider},
  title = {Electron injection by relativistic protons in active galactic nuclei},
  year = {1987},
  journal = {The Astrophysical Journal},
  volume = {320},
  pages = {L81},
  month = {09/1987},
  issn = {0004-637X},
  url = {http://articles.adsabs.harvard.edu/full/1987ApJ...320L..81S},
  doi = {10.1086/184980},
}