@ARTICLE{2009-UMUAI-Romero, AUTHOR = {Garcia, E. and Romero, C. and Ventura, S. and De Castro, C.}, TITLE = {An architecture for making recommendations to courseware authors using association rule mining and collaborative filtering}, JOURNAL = {User Modeling and User-Adapted Interaction}, VOLUME = {19}, NUMBER = {1-2}, YEAR = {2009}, PAGES = {99-132} }