@inproceedings{Staubert:2013uz,
  author = "Staubert, Ruediger",
  title = "{Hercules X-1: variations of the cyclotron line energy with flux, with phase and with time}",
  doi = "10.22323/1.176.0010",
  booktitle = "Proceedings of  An INTEGRAL view of the high-energy sky (the first 10 years) - 9th INTEGRAL Workshop and celebration of the 10th anniversary of the launch {\textemdash} PoS(INTEGRAL 2012)",
  year = 2013,
  volume = "176",
  pages = "010"
}