4[4]Geospatial-eXtensible Markup Language. Ministry of Economy,Trade and Industry ,Japan ,2001
5[5]F J Zrazaga-Soria,P J Banares,J Nogueras et al. Examples of vehicle location systems using CORBA-based distributed real-time GPS data and services[J].Computers Environment and Urban Systems,2001 ;25( 3 ): 293～305
6[6]D Fritsch,D Kinec,S Volz. NEXUS--Positioning and data management concept for location-aware applications[J].Computers Environment and Urban Systems,2001 ;25(3) :279～291
7[7]B Schmidt-Belz,Makelainen,A Nick et al. Intelligent Brokering of Tourism Services for Mobile Users[C].In:ENTER 2002 conference,Insbruck, Austria, 2002-01-23-25
8[8]M Angermann,P Robertson,A Steingass. Integration of Navigation and Communication Services for Personal Travel Assistance using JINI and JAVA Based Architecture
9[9]Nigel Davies,keith Cheverst,Keith Mitchell et al. Using and determining location in a context-sensitive tour guide[J].IEEE computer,2001:35～41
10[10]G Derekenaris,J Garofalakis,C Makris et al. Integrating GIS,GPS and GSM Technologies for the effective management of ambulances[J].Computers Environment and Urban Systems,2001 ;25(3) :267～278
