1. Bernhardsen, T., 1999. Geographic Information Systems: an Introduction. Wiley, New York, 448pp.
2. An overview of the bluetooth wireless technology;Bisdikian;IEEE Communications Magazine,2001
3. Cartographic Institute of Catalonia, 2000. New scenario for RASANT. Newsletter of the Institut Cartogràfic de Catalunya 12, 4pp.
4. CEN TC 278 WC7, 1996. Geographic Data Files (GDF), version 3.0, European Committee for Standardization, Technical Committee 278 WC7, 1996. 456pp.
5. IEEE 802.11 wireless local area networks;Crow;IEEE Communications Magazine,1997