TY - CHAP A1 - Piotrowski, Krzysztof A1 - Langendörfer, Peter A1 - Maaser, Michael A1 - Spichal, Gregor A1 - Schwander, Peter T1 - Charged Location Aware Services T2 - Wireless Information Systems, Proceedings of the 4th International Workshop on Wireless Information Systems, WIS 2005 Y1 - 2005 SN - 972-8865-21-X SP - 33 EP - 41 PB - INSTICC Press ER -