TY  - RPRT
TI  - Learned navigation in unknown terrains: A retraction method
AU  - Rao, Nageswara S. V.
AU  - Stoltzfus, N.
AU  - Iyengar, S. Sitharama
PY  - 1989
UR  - https://ntrs.nasa.gov/citations/19900019713
ID  - 19900019713
ER  -