@article{UBHD-68395337,
  author={Esser, Johannes},
  title={Analyzing temporal variations of AGN emission line profiles in the context of (dusty) cloud structure formation in the broad line region},
  year={2019},
  pages={12 S.},
  language={eng},
  issn={1432-0746},
  volume={621(2019) Artikel-Nummer A46},
  number={12 Seiten},
  note={Gesehen am 04.06.2019},
  journal={Astronomy and astrophysics},
  doi={10.1051/0004-6361/201834291},
}
@book{UBHD-68585068,
  author={Esser, Johannes},
  title={Physical properties of the circumnuclear cloud distribution in active galactic nuclei},
  address={Heidelberg},
  year={2020},
  pages={1 Online-Ressource (III, 131 Seiten)},
  language={eng},
  school={Dissertation,  Ruperto-Carola-University of Heidelberg,  2020},
  doi={10.11588/heidok.00028350},
  url={ https://nbn-resolving.org/urn:nbn:de:bsz:16-heidok-283503},
  library={UB},
}
@book{UBHD-68620985,
  author={Esser, Johannes},
  organization={Universit{\"a}t Heidelberg},
  title={Physical properties of the circumnuclear cloud distribution in active galactic nuclei},
  address={Heidelberg},
  year={2020},
  pages={III, 131 Seiten},
  language={eng},
  school={Dissertation,  Ruperto-Carola-University of Heidelberg,  2020},
  library={UB [Signatur: 2020 U 490]},
}
@article{UBHD-67963134,
  author={K{\"u}gler, Sven Dennis and Heidt, Jochen and Esser, Johannes},
  title={Properties of optically selected BL Lacertae candidates from the SDSS},
  year={2014},
  language={eng},
  issn={1432-0746},
  volume={569(2014) Artikel-Nummer A95},
  number={39 Seiten},
  note={Gesehen am 04.04.2016},
  journal={Astronomy and astrophysics},
  doi={10.1051/0004-6361/201322594},
}