@article{dollner2007integrating,
    author = {Döllner, Jürgen and Hagedorn, Benjamin},
    journal = {Urban and Regional Data Management: UDMS 2007 Annual},
    title = {Integrating urban GIS, CAD and BIM data by service-based virtual 3D city models},
    year = {2007},
    pages = {157--160},
    isbn = {978-0-415-44059-2},
    publisher = {Taylor \& Francis Group, London},
}