@article{UBHD-67928336,
  author={Bloom, Steven D. and Bock, Holger Arne and Dietrich, Matthias and Otterbein, Kai and Wagner, Stefan},
  title={Observations of a correlated gamma-ray and optical flare for BL Lacertae},
  year={1997},
  pages={L145-L148},
  language={eng},
  issn={2041-8213},
  volume={490},
  number={2},
  note={Gesehen am 21.01.2016},
  journal={The astrophysical journal},
  doi={10.1086/311035},
}
@article{UBHD-68021644,
  author={Bock, Holger Arne and Wagner, Stefan},
  title={Intraday-variability of flatspectrum-radio quasars},
  year={1994},
  pages={225},
  language={eng},
  volume={10},
  note={Gesehen am 25.08.2016},
  journal={Abstract series},
}
@conference{UBHD-67940181,
  author={Dietrich, Matthias and Wagner, Stefan and Bock, Holger Arne},
  title={Multiwavelength variability study of 3C 390.3},
  year={1995},
  pages={229},
  language={eng},
}
@article{UBHD-67932875,
  author={Dietrich, Matthias and Wagner, Stefan and Courvoisier, Thierry J. and Bock, Holger Arne},
  title={Structure of the broad-line region of 3C 273},
  year={1999},
  pages={31-42},
  language={eng},
  issn={1432-0746},
  volume={351},
  journal={Astronomy and astrophysics},
}
@article{UBHD-68021648,
  author={Grandi, Paola and Bock, Holger Arne and Wagner, Stefan},
  title={Multifrequency observation of the optically violent variable quasar 3C279},
  subtitle={ground-based campaign},
  year={1993},
  pages={1450},
  language={eng},
  issn={0002-7537},
  volume={25},
  note={Gesehen am 25.08.2016},
  journal={Bulletin of the American Astronomical Society},
}
@conference{UBHD-68021642,
  author={Heidt, Jochen and Bock, Holger Arne and K{\"u}mmel, Martin W. and Wagner, Stefan},
  title={Supplementary observations of OJ 287 and 3C 66A during the OJ-94 campaign},
  year={1994},
  pages={22-27},
  language={eng},
}
@article{UBHD-68021645,
  author={Heines, Anke R. and Bock, Holger Arne and Wagner, Stefan},
  title={Variability of gamma-bright quasars},
  year={1994},
  pages={224},
  language={eng},
  volume={10},
  note={Gesehen am 25.08.2016},
  journal={Abstract series},
}
@incollection{UBHD-67837010,
  author={Kraus, Adam L. and Quirrenbach, Andreas and Lobanov, A. and Krichbaum, T. P. and Schneider, P. and Wagner, Stefan and Heidt, Jochen and Bock, Holger Arne and Witze, A. and Aller, M. and Aller, H.},
  title={Unusual radio variability in the BL Lac object 0235+164},
  year={1999},
  pages={67-68},
  language={eng},
  isbn={1-886733-79-1 and 978-1-886733-79-4},
  booktitle={BL Lac phenomenon},
  editor={Takalo, Leo O. and Sillanp{\"a}{\"a}, Aimo},
}
@article{UBHD-67931688,
  author={Kraus, Alexander and Quirrenbach, Andreas and Wagner, Stefan and Heidt, Jochen and Bock, Holger Arne},
  title={Unusual radio variability in the BL Lacertae object 0235+164},
  year={1999},
  pages={807-816},
  language={eng},
  issn={1432-0746},
  volume={344},
  note={Gesehen am 28.1.2016},
  journal={Astronomy and astrophysics},
}
@article{UBHD-67926107,
  author={Maraschi, Laura and Montigny, Corinna von and Bock, Holger Arne and Wagner, Stefan},
  title={The 1993 multiwavelength campaign on 3C 279},
  subtitle={the radio to gamma-ray energy distribution inlow state},
  year={1994},
  pages={5 S.},
  language={eng},
  volume={435(1994},
  journal={The astrophysical journal},
}
@article{UBHD-67829641,
  author={Peng, Bo and Quirrenbach, Andreas and Wagner, Stefan and Bock, Holger Arne},
  title={Infrared, radio and optical variability of the BL Lacertae object 2007+777},
  year={2000},
  pages={937-943},
  language={eng},
  issn={1432-0746},
  volume={353},
  number={?},
  note={Gesehen am 11.06.2015},
  journal={Astronomy and astrophysics},
}
@article{UBHD-67926114,
  author={Sillanp{\"a}{\"a}, Aimo and Heidt, Jochen and Wagner, Stefan and Bock, Holger Arne and K{\"u}mmel, Martin W.},
  title={Confirmation of the 12-year optical outburst cycle in blazar OJ 287},
  year={1996},
  pages={L17-L20},
  language={eng},
  issn={1432-0746},
  volume={305},
  note={Gesehen am 07.01.2016},
  journal={Astronomy and astrophysics},
}
@conference{UBHD-68021246,
  author={Sillanp{\"a}{\"a}, Aimo and Heidt, Jochen and Bock, Holger Arne},
  title={Coordinated multifrequency observations of OJ 287 and Mk 421 (March 1993)},
  year={1994},
  pages={404},
  language={eng},
  isbn={0-7923-2745-4 and 0-7923-2744-6 and 978-0-7923-2745-5 and 978-0-7923-2744-8},
}
@conference{UBHD-68011641,
  author={Sillanp{\"a}{\"a}, Aimo and Heidt, Jochen and Wagner, Stefan and Bock, Holger Arne and K{\"u}mmel, Martin W.},
  title={Light curves of OJ 287, 3C 66A, AO 0235+164 and S5 0716+714 observed during the OJ-94 project},
  year={1996},
  pages={7},
  language={eng},
  isbn={951-29-0642-2 and 978-951-29-0642-0},
}
@conference{UBHD-68011645,
  author={Takalo, Leo O. and Heidt, Jochen and Bock, Holger Arne and Wagner, Stefan and K{\"u}mmel, Martin W.},
  title={Variability characteristics of Blazar OJ287},
  year={1996},
  pages={45-46},
  language={eng},
  isbn={0-7923-4122-8 and 0-7923-4121-X and 978-0-7923-4122-2 and 978-0-7923-4121-5},
}
@article{UBHD-67924006,
  author={Wagner, Stefan and Bock, Holger Arne and Heidt, Jochen and Montigny, Corinna von},
  title={High-energy gamma rays from PKS 1406–076 and the observation of correlated gamma-ray and optical emission},
  year={1995},
  pages={L97-L100},
  language={eng},
  issn={2041-8213},
  volume={454},
  journal={The astrophysical journal},
}