@inproceedings{Droulans:2010G/,
  author = "Droulans, Robert",
  title = "{GX 339-4: spectral variability of the hard X-ray emission}",
  doi = "10.22323/1.096.0053",
  booktitle = "Proceedings of The Extreme sky: Sampling the Universe above 10 keV {\textemdash} PoS(extremesky2009)",
  year = 2010,
  volume = "096",
  pages = "053"
}