1. ETSI TR 102 638 V1.1.1 (2009-06), Intelligent Transport Systems (ITS); Vehicular Communications; Basic Set of Applications; Definitions;European Telecommunications Standards Institute,2009
2. Keeping identity private;Adjei;IEEE Veh. Technol. Mag.,2011
3. ISO-21217-CALM-Architecture. Intelligent Transport Systems — Communications Access for Land Mobiles (CALM) — Architecture;International Standardization for Organization,2010
4. ETSI EN 302 665 (2010). Intelligent Transport Systems (ITS): Communications Architecture;European Telecommunications Standards Institute,2010
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