@inproceedings{Nasiroglu:20111V,
  author = "Nasiroglu, Ilham  and  Slowikowska, Agnieszka  and  Kanbach, Gottfried  and  Schwarz, Robert  and  Schwope, Axel",
  title = "{The orbital ephemeris and emission states of HU Aqr observed with OPTIMA}",
  doi = "10.22323/1.108.0048",
  booktitle = "Proceedings of High Time Resolution Astrophysics (HTRA) IV - The Era of Extremely Large Telescopes {\textemdash} PoS(HTRA-IV)",
  year = 2011,
  volume = "108",
  pages = "048"
}