@inproceedings{Ziolkowski:20130l,
  author = "Ziolkowski, Janusz",
  title = "{Determination of the masses of the components of the HDE 226868/Cyg X-1 binary system}",
  doi = "10.22323/1.176.0054",
  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 = "054"
}