@misc{indiciae51ea6e3f1688,
  title = {Learned navigation in unknown terrains: A retraction method},
  author = {Rao, Nageswara S. V. and Stoltzfus, N. and Iyengar, S. Sitharama},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900019713},
  note = {Source identifier: 19900019713}
}