@inproceedings{mjd07,
    author = {Maass, Stefan and Jobst, Markus and Döllner, Jürgen},
    booktitle = {The European Information Society - Leading the Way with Geo-information},
    title = {Depth Cue of Occlusion Information as Criterion for the Quality of Annotation Placement in Perspective Views},
    year = {2007},
    pages = {473--486},
    publisher = {Springer},
    series = {Lecture Notes in Geoinformation and Cartography},
    issn = {1863-2246},
}