@article{UBHD-67917530,
  author={Aiad, Abdel K. and Appenzeller, Immo and Bertout, Claude and Stahl, Otmar and Wolf, Bernhard},
  title={Coordinated spectroscopic observations of YY Orionis stars},
  year={1984},
  pages={67-78},
  language={eng},
  issn={1432-0746},
  volume={130},
  number={1},
  note={Gesehen am 18.12.2015},
  journal={Astronomy and astrophysics},
}
@article{UBHD-67916061,
  author={Aiad, Abdel K.},
  editor={Appenzeller, Immo and Marenbach, Gerd and Wolf, Bernhard},
  title={On the absorption spectrum of RW Aurigae},
  year={1983},
  pages={656-661},
  language={eng},
  issn={1538-3873},
  volume={95},
  journal={Publications of the Astronomical Society of the Pacific},
}