@incollection{kd10a,
    author = {Klimke, Jan and Döllner, Jürgen},
    booktitle = {Geospatial Thinking},
    title = {Geospatial Annotations for 3D Environments and their WFS-based Implementation},
    year = {2010},
    pages = {379--397},
    publisher = {Springer},
    series = {Lecture Notes in Geoinformation and Cartography},
    doi = {10.1007/978-3-642-12326-9_20},
    isbn = {978-3-642-12325-2},
    issn = {1863-2246},
}