@article{8781,
  author = {T. Kallman and Richard McCray and G. Voit},
  title = {Rapid variability of P Cygni lines in massive X-ray binaries},
  year = {1987},
  journal = {The Astrophysical Journal},
  volume = {317},
  pages = {746},
  month = {Jan-06-1987},
  issn = {0004-637X},
  url = {http://adsabs.harvard.edu/full/1987ApJ...317..746K},
  doi = {10.1086/165322},
}