Dynamic ray shooting and shortest paths via balanced geodesic triangulations

Michael T. Goodrich and Roberto Tamassia
Proc. 9th Symp. Computational Geometry, ACM, May 1993, pp. 318–327

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Maintenance of a minimum spanning forest in a dynamic planar graph

Fano Experimental Web Server, D. Eppstein, School of Information & Computer Science, UC Irvine