@article{5367,
  author = {Mitchell Begelman and M. Rees and Marek Sikora},
  title = {Energetic and radiative constraints on highly relativistic jets},
  year = {1994},
  journal = {The Astrophysical Journal},
  volume = {429},
  pages = {L57},
  month = {07/1994},
  issn = {0004-637X},
  url = {http://articles.adsabs.harvard.edu/full/1994ApJ...429L..57B},
  doi = {10.1086/187412},
}