1. Abdul-Rahman, A., & Pilouk, M. (2007). Spatial data modelling for 3D GIS. Berlin: Springer.
2. Becker, T., Nagel, C., & Kolbe, T. H. (2011). Integrated 3D modeling of multi-utility networks and their interdependencies for critical infrastructure analysis. In Advances in 3D Geo-Information Sciences (pp. 1–20): Springer, Berlin.
3. Coors, V., & Flick, S. (1998). Integrating Levels of Detail in a Web-based 3D-GIS. In Proceedings of the 6th ACM international symposium on Advances in geographic information systems, (pp. 40–45): ACM.
4. Cypriani, M., Lassabe, F., Canalda, P., & Spies, F. (2010). Wi-Fi-based indoor positioning: Basic techniques, hybrid algorithms and open software platform. In Indoor Positioning and Indoor Navigation (IPIN), 2010 International Conference on, (pp. 1–10): IEEE.
5. Czerwinski, A., Sandmann, S., Stöcker-Meier, E., & Plümer, L. (2007). Sustainable SDI for EU noise mapping in NRW–best practice for INSPIRE. International Journal for Spatial Data Infrastructure Research, 2(1), 90–111.