@article{Zdziarski:2012,
  author  = "A. Zdziarski and P. Lubiński and M. Sikora",
  title   = "The MeV spectral tail in Cyg X-1 and optically thin emission of jets",
  journal = "Monthly Notices of the Royal Astronomical Society",
  volume  = "Vol. 423",
  pages   = "663--675",
  year    = "2012",
}