@article{kleiner_et_al_jaamas11,
   author = {A. Kleiner and A. Kolling and K. Sycara and M. Lewis},
   affiliation = {Dept. of Computer Science, University of Freiburg,
	Georges-K{\"o}hler-Allee 079, 79110 Freiburg, Germany},
   title = {Hierarchical visibility for guaranteed search in large-scale
	outdoor terrain". Journal of Autonomous Agents and Multi-Agent
	Systems},
   journal = {Journal of Autonomous Agents and Multi-Agent Systems (JAAMAS)},
   year = {2011},
   note = {(submitted for review)}
}