Theoretical Computer Science |
November 2009, Vol 410(47-49): pp. 4905-4919
An extended abstract appears in Proceedings of the 19th International Symposium on Algorithms and Computation ( ISAAC'2008), Gold Coast, Australia, Dec. 2008
17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL GIS 2009), November 4-6, Seattle, WA | November 2009
17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL GIS 2009), November 4-6, 2009, Seattle, WA | November 2009