@misc{indiciae6da45fdfec1b,
  title = {Conjugate gradient methods with an application to V/STOL flight-path optimization.},
  author = {Bryson, A. E., Jr. and Mehra, R. K.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690048774},
  note = {Source identifier: 19690048774}
}