Ralf Klamma Mohamed Amine Chatti Erik Duval Sebastian Fiedler Hans G. K. Hummel Ebba Thora Hvannberg Andreas Kaibel Barbara Kieslinger Milos Kravcik Effie Lai-Chong Law Ambjörn Naeve Peter Scott Marcus Specht Colin Tattersall Riina Vuorikari Social Software for Professional Learning: Examples and Research Issues. 912-915 2006 conf/icalt/2006 ICALT http://doi.ieeecomputersociety.org/10.1109/ICALT.2006.295 db/conf/icalt/icalt2006.html#KlammaCDFHHKKKLNSSTV06