@inproceedings{bdhk99,
    author = {Baumann, Konstantin and Döllner, Jürgen and Hinrichs, Klaus and Kersting, Oliver},
    booktitle = {IEEE Proceedings Computer Graphics International},
    title = {A Hybrid, Hierarchical Data Structure for Real-Time Terrain Visualization},
    year = {1999},
    pages = {85--92},
}