@misc{indiciaec6b684871174,
  title = {Variability of LMC X-4},
  author = {Epstein, A. and Delvaille, J. and Helmken, H. and Murray, S. and Schnopper, H. W. and Doxsey, R. and Primini, F.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770061288},
  note = {Source identifier: 19770061288}
}