@article{bnpw-oarcd-10,
 author = {Been, Ken and Nöllenburg, Martin and Poon, Sheung-Hung and Wolff, Alexander},
 doi = {10.1016/j.comgeo.2009.03.006},
 journal = {Comput. Geom. Theory Appl.},
 number = {3},
 pages = {312--328},
 title = {Optimizing Active Ranges for Consistent Dynamic Map Labeling},
 volume = {43},
 year = {2010}
}