Fabian Abel Ig Ibert Bittencourt Nicola Henze Daniel Krause Julita Vassileva A Rule-Based Recommender System for Online Discussion Forums. 12-21 2008 AH http://dx.doi.org/10.1007/978-3-540-70987-9_4 conf/ah/2008 db/conf/ah/ah2008.html#AbelBHKV08