1. On the power of the compass (or, why mazes are easier to search than graphs);Blum,1978
2. The complexity of elementary algebra and geometry;Ben-Or;J. Comp. Syst. Sci.,1986
3. On the capability of finite automata in 2 and 3 dimensional space;Blum,1977
4. An efficient algorithm for one-step compliant motion planning with uncertainty;Briggs;Algorithmica,1992
5. R.G. Brown, Forthcoming Ph.D. Thesis, Computer Science Department, Cornell University, Ithaca, NY, USA.