@misc{indiciae67bd190b31c1,
  title = {A neighboring optimum feedback control scheme based on estimated time-to-go with application to re-entry flight paths.},
  author = {Bryson, A. E., Jr. and Speyer, J. L.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680046095},
  note = {Source identifier: 19680046095}
}