@article{PB-VRVis-2007-008,
author = {Maierhofer, Stefan and Simon, R. and Tobler, Robert},
title = {Simplified Guided Visibility Sampling for Location Based Services},
year = {2007},
journaltitle = {Proceedings of the CORP 2007},
url = {https://www.vrvis.at/publications/PB-VRVis-2007-008},
pages = {101-107},
}