@article{UBHD-67912750,
  author={Appenzeller, Immo and Thiering, Ingeborg and Krautter, Joachim and Kneer, Reinhold and Pakull, Manfred W.},
  title={Identification of a complete sample of northern ROSAT all-sky survey X-ray sources},
  subtitle={III. The catalog},
  year={1998},
  pages={319-340},
  language={eng},
  issn={1538-4365},
  volume={117},
  journal={The astrophysical journal},
}
@conference{UBHD-67912751,
  author={Krautter, Joachim and Thiering, Ingeborg and Appenzeller, Immo and Kneer, Reinhold},
  title={Identification of a complete sample of northern ROSAT all-sky survey X-ray sources},
  year={1998},
  pages={449},
  language={eng},
  isbn={0-7923-4803-6 and 0-7923-4802-8 and 978-0-7923-4802-3 and 978-0-7923-4803-0},
}
@article{UBHD-67912260,
  author={Krautter, Joachim and Appenzeller, Immo and Thiering, Ingeborg and Pakull, Manfred W.},
  title={Identification of a complete sample of northern ROSAT all-sky survey x-ray sources},
  subtitle={IV. statistical analysis},
  year={1999},
  pages={743-752},
  language={eng},
  issn={1432-0746},
  volume={350},
  journal={Astronomy and astrophysics},
}
@article{UBHD-67912261,
  author={Krautter, Joachim and Appenzeller, Immo and Thiering, Ingeborg and Pakull, Manfred W.},
  title={Identification of a complete sample of northern ROSAT all-sky survey x-ray sources},
  subtitle={IV. statistical analysis},
  year={1999},
  pages={743-752},
  language={eng},
  issn={0004-6361},
  volume={350},
  journal={Astronomy & astrophysics},
}
@conference{UBHD-67914198,
  author={Thiering, Ingeborg and Krautter, Joachim and Appenzeller, Immo and Kneer, Reinhold},
  title={The LSW-MPE-INAOE project for optical identification of a complete sample of northern ROSAT survey sources},
  subtitle={status report},
  year={1995},
  pages={201},
  language={eng},
}
@article{UBHD-67912770,
  author={Zickgraf, Franz-Josef and Krautter, Joachim and Thiering, Ingeborg and Appenzeller, Immo},
  title={Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources},
  subtitle={V. Discovery of a z=4.28 QSO near the RASS source RX J1028.6-0844},
  year={1997},
  pages={L21-L24},
  language={eng},
  issn={0004-6361},
  volume={323},
  journal={Astronomy & astrophysics},
}
@article{UBHD-67912771,
  author={Zickgraf, Franz-Josef and Krautter, Joachim and Thiering, Ingeborg and Appenzeller, Immo},
  title={Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources},
  subtitle={V. Discovery of a z=4.28 QSO near the RASS source RX J1028.6-0844},
  year={1997},
  pages={L21-L24},
  language={eng},
  issn={1432-0746},
  volume={323},
  journal={Astronomy and astrophysics},
}
@article{UBHD-67914174,
  author={Zickgraf, Franz-Josef and Thiering, Ingeborg and Krautter, Joachim and Appenzeller, Immo and Kneer, Reinhold and Pakull, Manfred W. and Heidt, Jochen},
  title={Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources},
  subtitle={II. the optical observations},
  year={1997},
  pages={103-114},
  language={eng},
  issn={1286-4846},
  volume={123},
  number={1},
  journal={Astronomy & astrophysics},
}
@article{UBHD-67912753,
  author={Zickgraf, Franz-Josef and Pakull, Manfred W. and Krautter, Joachim and Appenzeller, Immo and Thiering, Ingeborg},
  title={Identification of a complete sample of northern ROSAT all-sky survey X-ray sources},
  year={1998},
  pages={42},
  language={eng},
  issn={1521-3994},
  volume={319},
  number={1-5},
  journal={Astronomische Nachrichten},
  doi={10.1002/asna.2123190121},
}
@incollection{UBHD-67914205,
  author={Zickgraf, Franz-Josef and Thiering, Ingeborg and Krautter, Joachim and Appenzeller, Immo and Kneer, Reinhold},
  title={The LSW-MPE-INAOE project for optical identification of a complete sample of northern ROSAT survey sources},
  year={1994},
  pages={189},
  language={eng},
  booktitle={Abstracts of contributed talks and posters presented at the scientific fall meeting of the Astronomische Gesellschaft at Potsdam},
  editor={Klare, Gerhard},
}
@conference{UBHD-67914194,
  author={Zickgraf, Franz-Josef and Thiering, Ingeborg and Krautter, Joachim and Appenzeller, Immo and Kneer, Reinhold},
  title={The LSW-MPE-INAOE project for optical identification of a complete sample of northern ROSAT survey sources},
  year={1996},
  pages={665-666},
  language={eng},
}
@conference{UBHD-67914183,
  author={Zickgraf, Franz-Josef and Krautter, Joachim and Appenzeller, Immo and Thiering, Ingeborg},
  title={Optical identification of a complete sample of northern RASS X-ray sources},
  year={1997},
  pages={158},
  language={eng},
}