@conference{UBHD-68009456,
  author={Heidt, Jochen and Sutorius, Eckhard},
  title={Host galaxies and cluster environment of BL Lac objects at z > 0.5},
  year={2001},
  pages={39},
  language={eng},
  isbn={0-306-46662-7 and 978-0-306-46662-5},
}
@article{UBHD-68009431,
  author={Ziegler, Bodo L. and Heidt, Jochen and Mehlert, D{\"o}rte and M{\"o}llenhoff, Claus and Noll, Stefan and Sutorius, Eckhard},
  title={The evolution of the Tully-Fisher relation of spiral galaxies},
  year={2001},
  pages={L69-L72},
  language={eng},
  issn={2041-8213},
  volume={564},
  number={2},
  note={Gesehen am 20.07.2016},
  journal={The astrophysical journal},
  doi={10.1086/338962},
}