@conference {Kleinermann2007, title = {Adding Semantic Annotations, Navigation Paths and Tour Guides to Existing Virtual Environments}, booktitle = {Proceedings of the 13th International Conference on Virtual Systems and Multimedia (VSMM)}, year = {2007}, pages = {50-62}, publisher = {Springer-Verlag}, organization = {Springer-Verlag}, address = {Brisbane, Australia}, author = {F. Kleinermann and O. De Troyer and C. Creelle and B. Pellens} }