@inproceedings{TUC-HCIS/GMHP12, author = "S. Gross and B. Mokbel and B. Hammer and N. Pinkwart", title = "Feedback Provision Strategies in Intelligent Tutoring Systems Based on Clustered Solution Spaces", year = 2012, booktitle = "Tagungsband der 10. e-Learning Fachtagung Informatik (DeLFI)", publisher = "GI", number = 207, keywords = "fit" }