%0 Journal Article %T Authoring Tutors with SimStudent: An Evaluation of Efficiency and Model Quality %A MacLellan, Christopher J. %A Koedinger, Kenneth R. %A Matsuda, Noboru %A , %J Intelligent Tutoring Systems, Lecture Notes in Computer Science %P 551-560 %@ 0302-9743 %D 2014-01-01 %I Springer International Publishing %~ DeepDyve