@misc{indiciae228f25dfae9b,
  title = {Conjugate gradient optimization programs for shuttle reentry},
  author = {Powers, W. F. and Jacobson, R. A. and Leonard, D. A.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720019066},
  note = {Source identifier: 19720019066}
}