@conference {Gao2011,
	title = {Optimization for viewshed analysis on GPU},
	booktitle = {Proceedings - 2011 19th International Conference on Geoinformatics, Geoinformatics 2011},
	year = {2011},
	note = {施引文献 5},
	doi = {10.1109/GeoInformatics.2011.5980830},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-80052366988\&partnerID=40\&md5=63c03f966e16b29eef7224e687284909},
	author = {Y. Gao and H. Yu and Y. Liu and Y. Liu and M. Liu and Y. Zhao}
}
