@conference{9259,
  author = {Marek Sikora and B. Rudak and Mitchell Begelman},
  title = {Relativistic neutrons in active galactic nuclei},
  year = {1989},
  journal = {unknown},
  publisher = {Kluwer Academic Publishers, Dordrecht},
  address = {Santa Cruz, California},
  url = {http://adsabs.harvard.edu/full/1989IAUS..134..215S},
  note = {JILA Pub. 3902},
}