@misc{indiciaec7e36fa53d5d,
  title = {Quasars, blazars, and gamma rays},
  author = {Dermer, Charles D. and Schlickeiser, Reinhard},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19930026548},
  note = {Source identifier: 19930026548}
}