Mobile Communities - Extending Online Communities into the Real World. - Christian Hillebrand; Georg Groh; Michael Koch 001 (Mobile and Collaborative Business, 2002)

Terminalbasierte Positionsbestimmung als Grundlage von proaktiven Location Based (Community) Services in mobilen Funknetzwerken (Terminal based positioning as basis for proactive location based (community) services in mobile wireless networks) - Christian Hillebrand (2012)