Andreas Harrer Sabrina Ziebarth Adam Giemza Heinz Ulrich Hoppe A Framework to Support Monitoring and Moderation of e-Discussions with Heterogeneous Discussion Tools. 41-45 2008 ICALT http://dx.doi.org/10.1109/ICALT.2008.249 conf/icalt/2008 db/conf/icalt/icalt2008.html#HarrerZGH08