@book{UBHD-67677229,
  author={Ludwig, Johannes},
  title={A survey of dwarfs and tidal debris around nearby massive galaxies – deep imaging with medium-sized telescopes},
  year={2014},
  pages={Online-Ressource (192 S.)},
  language={eng},
  note={Zusammenfassung in deutscher Sprache},
  school={Heidelberg, Univ., Diss., 2014},
  doi={10.11588/heidok.00017232},
  keywords={Streams / Merger / Structure / Galaxie / Bildgebendes Verfahren / Zwerggalaxie / Spiralgalaxie / Colour},
  url={http://www.ub.uni-heidelberg.de/archiv/17232},
  library={UB},
}
@incollection{UBHD-67699033,
  author={Ludwig, Johannes and Grebel, Eva K. and Pasquali, Anna},
  title={Dwarf galaxies in nearby galaxy groups},
  year={2012},
  pages={285-288$p4 S.},
  language={eng},
  isbn={978-3-642-22018-0},
  note={Gesehen am 04.11.2014},
  booktitle={Dwarf Galaxies: Keys to Galaxy Formation and Evolution},
  doi={10.1007/978-3-642-22018-0_33},
}
@conference{UBHD-67699034,
  author={Ludwig, Johannes and Grebel, Eva K. and Pasquali, Anna},
  title={Dwarf galaxies in nearby galaxy groups},
  year={2012},
  pages={285-288},
  language={eng},
  isbn={978-3-642-22017-3 and 3-642-22017-7},
}
@incollection{UBHD-67683578,
  author={Ludwig, Johannes and Pasquali, Anna and Grebel, Eva K.},
  title={Giant galaxies, dwarfs, and debris survey},
  subtitle={I. Dwarf galaxies and tidal features around NGC 7331},
  year={2012},
  pages={?},
  language={eng},
  note={Gesehen am 07.10.2014},
  booktitle={De.arxiv.org},
}
@article{UBHD-67683579,
  author={Ludwig, Johannes and Pasquali, Anna and Grebel, Eva K.},
  title={Giant galaxies, dwarfs, and debris survey},
  subtitle={I. Dwarf galaxies and tidal features around NGC 7331},
  year={2012},
  pages={190},
  language={eng},
  issn={1538-3881},
  volume={144},
  number={6},
  note={Gesehen am 07.10.2014},
  journal={The astronomical journal},
  doi={10.1088/0004-6256/144/6/190},
}
@book{UBHD-67675351,
  author={Ludwig, Johannes},
  title={A survey of dwarfs and tidal debris around nearby massive galaxies},
  year={2014},
  pages={IV, 180 S.},
  language={eng},
  note={Zsfassung in dt. Sprache},
  school={Heidelberg, Univ., Diss., 2014},
  keywords={Streams / Merger / Structure / Galaxie / Bildgebendes Verfahren / Zwerggalaxie / Spiralgalaxie / Colour},
  library={UB [Signatur: 2014 U 905]},
}