1. Searching with uncertainty;Baeza-Yates,1988
2. Searching in the plane;Baeza-Yates;Inform. Comput.,1993
3. Parallel searching in the plane;Baeza-Yates,1992
4. A minimization problem;Bellman;Bulletin AMS,1956
5. MAPLE V Language and Library Reference Manual;Char,1991