W. Schnotz, and A. Heiß. Computers in Human Behavior, 25 (2):
371 - 380(2009)Including the Special Issue: State of the Art Research into Cognitive Load Theory.
J. Tang, H. fung Leung, Q. Luo, D. Chen, and J. Gong. IJCAI'09: Proceedings of the 21st international jont conference on Artifical intelligence, page 2089--2094. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (2009)
J. Middleton, S. Gorard, C. Taylor, and B. Bannan-Ritland. Handbook of design research methods in education: Innovations in science, technology, engineering, and mathematics learning and teaching, (2008)
H. Mellar, M. Oliver, and C. Hadjithoma-Garstka. Transforming Higher Education through Technology-Enhanced Learning, Higher Education Academy, York, UK, (2009)
M. Goldwasser, and D. Letscher. OOPSLA '07: Companion to the 22nd ACM SIGPLAN conference on Object-oriented programming systems and applications companion, page 889--896. New York, NY, USA, ACM, (2007)
S. Sekine. Proceedings of the Sixth International Language Resources and Evaluation (LREC'08), Marrakech, Morocco, European Language Resources Association (ELRA), (May 2008)http://www.lrec-conf.org/proceedings/lrec2008/.