@misc{indiciae6accc6805e3d,
  title = {Decrease in the Orbital Period of Hercules X-1},
  author = {Deeter, John E. and Boynton, Paul E. and Miyamoto, Sigenori and Kitamoto, Shunji and Nagase, Fumiaki and Kawai, Nobuyuki},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19970014205},
  note = {Source identifier: 19970014205}
}