@incollection{rbdk09,
    author = {Ross, Lutz and Bolling, Jannes and Döllner, Jürgen and Kleinschmit, Birgit},
    booktitle = {Advances in GIScience},
    title = {Enhancing 3D City Models with Heterogeneous Spatial Information: Towards 3D Land Information Systems},
    year = {2009},
    pages = {113--133},
    publisher = {Springer},
    doi = {10.1007/978-3-642-00318-9_6},
    series = {Lecture Notes in Geoinformation and Cartography},
}