@misc{indiciae45c86d85c148,
  title = {Earth orbiting Sisyphus system study},
  author = {Jurkevich, I. and Krause, K. W. and Neste, S. L. and Soberman, R. K.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720012226},
  note = {Source identifier: 19720012226}
}