@InProceedings{Filothodoros:2017,
  author      = "A. Filothodoros and P. Lubiński and A. Zdziarski",
  title       = "Spectral variability of Cyg X-1 using INTEGRAL data",
  booktitle   = "XXXVIII Polish Astronomical Society Meeting; ISBN: 9788395043000",
  address     = "Zielona Góra, Polska",
  publisher   = "Warszawa, Polskie Towarzystwo Astronomiczne",
  volume      = "PTA Proceedings, Vol. 7",
  pages       = "326--329",
  year        = "2017",
}