@inproceedings{hd2009,
    author = {Hildebrandt, Dieter and Döllner, Jürgen},
    booktitle = {Geoinformatik 2009},
    title = {Implementing 3D Geovisualization in Spatial Data Infrastructures: The Pros and Cons of 3D Portrayal Services},
    year = {2009},
    pages = {9},
    edition = {Wolfgang Reinhardt and Antonio Krüger and Manfred Ehlers},
}