@misc{indiciae28fbed831bc6,
  title = {Second decrease in the period of the Vela Pulsar.},
  author = {Reichley, P. E. and Downs, G. S.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720028238},
  note = {Source identifier: 19720028238}
}