J. Gil, and I. Maman. OOPSLA '05: Proceedings of the 20th annual ACM SIGPLAN conference on Object oriented programming, systems, languages, and applications, page 97--116. San Diego, CA, USA, ACM, (2005)
I. Hsiao, S. Sosnovsky, and P. Brusilovsky. Learning in the Synergy of Multiple Disciplines, Proceedings of the EC-TEL 2009, volume 5794 of Lecture Notes in Computer Science, Berlin/Heidelberg, Springer, (October 2009)