Orbital modulation of X-ray emission lines in Cygnus X-3v. 501EDP Sciences679–686
Vilhu, O., Hakala, P., Hannikainen, D. C., McCollough, Michael L., and Koljonen, K. 2009. "Orbital modulation of X-ray emission lines in Cygnus X-3." Astronomy and Astrophysics, 501 679–686.