@article{klimke2012a,
    author = {Klimke, Jan and Döllner, Jürgen},
    journal = {Directions Magazine},
    title = {Service-oriented Visualization of Virtual 3D City Models},
    year = {2012},
    note = {http://www.directionsmag.com/articles/service-oriented-visualization-of-virtual-3d-city-models/226560},
}