S. Graf, T. Chang, A. Kersebaum, T. Rath, und J. Kurcz. Advanced Learning Technologies (ICALT), 2014 IEEE 14th International Conference on, Seite 112--116. IEEE, (Juli 2014)
P. Brusilovsky, J. Eklund, und E. Schwarz. Proceedings of the Seventh International Conference on World Wide Web 7, Volume 30 von WWW7, Seite 291--300. Amsterdam, The Netherlands, The Netherlands, Elsevier Science Publishers B. V., (April 1998)
P. Brusilovsky, J. Eklund, und E. Schwarz. Proceedings of the Seventh International Conference on World Wide Web 7, Seite 291--300. Amsterdam, The Netherlands, The Netherlands, Elsevier Science Publishers B. V., (1998)
R. Hosseini, I. Hsiao, J. Guerra, und P. Brusilovsky. Artificial Intelligence in Education, Volume 9112 von Lecture Notes in Computer Science, Springer International Publishing, (2015)