Y. Cui, и C. Penstein Rosé. Intelligent Tutoring Systems, том 5091 из Lecture Notes in Computer Science, глава 107, Springer-Verlag, Berlin/Heidelberg, (2008)
A. Déry-Pinna, A. Occello, и M. Riveill. Human-Centered Software Engineering, том 7623 из Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2012)