@article{UBHD-68044872,
  author={Camenzind, Max and Krockenberger, Martin},
  title={The lighthouse effect of relativistic jets in blazars},
  subtitle={A geometric origin of intraday variability},
  year={1992},
  pages={59-62},
  language={eng},
  issn={1432-0746},
  volume={255},
  number={1/2},
  note={Gesehen am 02.11.2016},
  journal={Astronomy and astrophysics},
}
@conference{UBHD-68044874,
  author={Camenzind, Max and Krockenberger, Martin},
  title={The quasiperiodicity and the origin of Knots in quasars},
  year={1992},
  pages={551},
  language={eng},
  isbn={3-540-55554-4 and 0-387-55554-4 and 978-0-387-55554-6 and 978-3-540-55554-4},
}