Intervisibility on terrains

Leila De Floriani and Paola Magillo
Geographic Information Systems: Principles, Techniques, Managament and Applications, P. A. Longley, M. F. Goodchild, D. J. Maguire, and D. W. Rhind, ed., John Wiley & Sons, 1999, pp. 543–556
http://citeseer.nj.nec.com/351023.html

Cites:

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