@misc{indiciae5bdf64ca6293,
  title = {Neighboring extremal guidance for systems with a piecewise linear control},
  author = {Hull, David G. and Helfrich, Clifford E.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920035220},
  note = {Source identifier: 19920035220}
}