J. Beck, K. min Chang, J. Mostow, и A. Corbett. Intelligent Tutoring Systems, том 5091 из Lecture Notes in Computer Science, стр. 383-394. Springer, (2008)
J. Beck, K. Chang, J. Mostow, и A. Corbett. Intelligent Tutoring Systems, том 5091 из Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2008)
J. Beck, K. Chang, J. Mostow, и A. Corbett. Intelligent Tutoring Systems, том 5091 из Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2008)