@misc{indiciae8193a16209f5,
  title = {Relativistic neutrons in active galactic nuclei},
  author = {Sikora, Marek and Begelman, Mitchell C. and Rudak, Bronislaw},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890054862},
  note = {Source identifier: 19890054862}
}