@misc{indiciae1dca23afbf56,
  title = {Variational Trajectory Optimization Tool Set: Technical description and user's manual},
  author = {Bless, Robert R. and Queen, Eric M. and Cavanaugh, Michael D. and Wetzel, Todd A. and Moerder, Daniel D.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930023192},
  note = {Source identifier: 19930023192}
}