@InProceedings{fossati:2008:SRW,
  author    = {Fossati, Davide},
  title     = {The Role of Positive Feedback in {I}ntelligent {T}utoring {S}ystems},
  booktitle = {Proceedings of the ACL-08: HLT Student Research Workshop},
  month     = {June},
  year      = {2008},
  address   = {Columbus, Ohio},
  publisher = {Association for Computational Linguistics},
  pages     = {31--36},
  url       = {http://www.aclweb.org/anthology/P/P08/P08-3006}
}