1. Baker, R., Human navigation and the sixth sense, New York 1981.
2. Best-GIS, Guidelines for best practice in user interface for GIS. The European Commission, DGIII — industry, ESPRIT Programme, Geographical Information Systems International Group, 1998.
3. Bishop, I. D., Karadaglis, C., Use of interactive immersive visualization techniques for natural resources management. In: SPIE 2656, S.128–139, 1994.
4. Brutzman, D., The Virtual Reality Modeling Language and Java, Communications of the ACM, 41 (6), 1998, S. 57–64.
5. Car, A., Hierarchical spatial reasoning: Theoretical consideration and its application to modeling way-finding, Vienna, 1996.