1. Abdul-Rahman, A., Zlatanova, S. and Coors, V. (2006): Innovations in 3D Geo Information Systems. Springer.
2. Ahas, R. and Mark, U. (2005): Location based services: New challenges for planning and public administration. Futures, 37, 547-561.
3. Arai, Y. (2006): Geolocation technology and local information: Case in Japan. NETCOM, 20 (1-2), 9-25.
4. Birkin, M., Clarke, G. and Clarke, M. (2002): Retail Geography & Intelligent Network Planning. Wiley.
5. Birkin, M., Clarke, G., Clarke, M. and Culf, R. (2004): Using spatial models to solve difficult retail location problems. in Applied GIS and Spatial Analysis edited by Stillwell, J. and Clarke, G., Wiley, 35-54.