@ {3183, title = {Interactive 3D Multimedia Content - Models for Creation, Management, Search and Presentation}, year = {2012}, pages = {171-193}, publisher = {Springer}, chapter = {Secure User-Contributed 3D Virtual Environments}, isbn = {978-1-4471-2496-2}, doi = {10.1007/978-1-4471-2497-9_7}, url = {https://link.springer.com/chapter/10.1007\%2F978-1-4471-2497-9_7}, author = {A. W{\'o}jtowicz}, editor = {Wojciech Cellary and Krzysztof Walczak} }