Kevin A. Gluck Valerie J. Shute John R. Anderson Marsha C. Lovett Deconstructing a Computer-Based Tutor: Striving for Better Learning Efficiency in Stat Lady. 66-75 http://dx.doi.org/10.1007/3-540-68716-5_12 1998 conf/its/1998 Intelligent Tutoring Systems db/conf/its/its1998.html#GluckSAL98