@misc{indiciaef3214b18dc3b,
  title = {Persistent emission and bursts from Aquila X-1 observed by Einstein},
  author = {Czerny, M. and Czerny, B. and Grindlay, J. E.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19870042237},
  note = {Source identifier: 19870042237}
}