@misc{indiciae6cf41a5d4ee6,
  title = {Condensed objects in the Crab Nebula.},
  author = {Burbidge, G. and Hoyle, F.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690043496},
  note = {Source identifier: 19690043496}
}