1. Parallel algorithm for viewshed analysis on a modern GPU;Chao;Int. J. Digital Earth,2011
2. Geospatial Analysis: A Comprehensive Guide to Principles, Techniques and Software Tools;De Smith,2007
3. A parallel algorithm for viewshed analysis in three-dimensional digital earth;Feng;Comput. Geosci.,2014
4. A parallel sweep line algorithm for visibility computation;Ferreira,2013
5. W. Franklin, S. Mehta, Geometric algorithms for siting of air defense missile batteries, A Research Project for Battle, No. 2756, 1994.