1. Solving the find-path problem by good representation of free space;Brooks;IEEE Trans. on Systems, Man and Cybernetics,1983
2. The complexity of robot motion planning;Canny,1988
3. Pattern Classification and Scene Analysis;Duda,1973
4. Planning, geometry, and complexity of robot motion;Sharir,1986
5. Efficient computation of continuous skeletons;Kirkpatrick;Proceedings of 20th IEEE Annual Symp. on Foundations of Comput. Science,1979