11th International Conference on Innovative Internet Community Systems (I2CS 2011) : June 15 - 17, 2011, Deutsche Telekom Laboratories, Berlin, Germany ; [selected contributions of this conference plus a selection of excellent, still unpublished I2CS papers from 2008] - Eichler, Gerald (Herausgeber); International Conference on Innovative Internet Community Systems (11 : 2011 : Berlin) (GI-Edition. Proceedings, 2011)