@misc{indiciaeaf0e58dd90cb,
  title = {Pulsed high-energy gamma rays from the Crab Nebula.},
  author = {Mcbreen, B. and Ball, S. E., Jr. and Campbell, M. and Greisen, K. and Koch, D.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730056958},
  note = {Source identifier: 19730056958}
}