@misc{indiciaefd213c815005,
  title = {Spectral variability in early-type binary X-ray systems},
  author = {Mccray, R. and Kallman, T. R. and Castor, J. I. and Olson, G. L.},
  year = {1984},
  url = {https://ntrs.nasa.gov/citations/19840011127},
  note = {Source identifier: 19840011127}
}