@inproceedings{Shakura:2020X4,
  author = "Shakura, N. I.  and  Kolesnikov, D.  and  Postnov, K.  and  Volkov, I.  and  Bikmaev, I.  and  Irsmambetova, T.  and  Staubert, R.  and  Wilms, J.  and  Irtuganov, E.  and  Shurygin, P.  and  Golysheva, P.  and  Shugarov, S.  and  Nikolenko, I.  and  Trunkovsky, E.  and  Schonherr, G.  and  Schwope, A.  and  Klochkov, D.",
  title = "{Multi-frequency long-term observations of Her X-1 - The 35-d cycle}",
  doi = "10.22323/1.362.0047",
  booktitle = "Proceedings of Multifrequency Behaviour of High Energy Cosmic Sources - XIII {\textemdash} PoS(MULTIF2019)",
  year = 2020,
  volume = "362",
  pages = "047"
}