TY  - RPRT
TI  - A problem of collision avoidance
AU  - Vincent, T. L.
AU  - Cliff, E. M.
AU  - Grantham, W. J.
AU  - Peng, W. Y.
PY  - 1972
UR  - https://ntrs.nasa.gov/citations/19730005974
ID  - 19730005974
ER  -