@article{Vasco:2011GQ,
  author = "Vasco, Davide  and  Klochkov, Dmitry  and  Staubert, Ruediger",
  title = "{Cyclotron line changes in Her X-1}",
  doi = "10.22323/1.115.0127",
  journal = "PoS",
  year = 2011,
  volume = "INTEGRAL 2010",
  pages = "127"
}