@misc{indiciae4dd18192c8fd,
  title = {An elliptical binary orbit model of GX 1 + 4},
  author = {Cutler, E. P. and Dennis, B. R. and Dolan, J. F.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860040520},
  note = {Source identifier: 19860040520}
}