6Karin Anna Hummel, Helmut Hlavacs. Anytime, Anywhere Learning Behavior Using a Web-Based Platform for a University Lecture [DB/OL]. www.ani. univie.ac.at/-avacs/p ublications/ssgrr_ winter03 .pdf.
7Wan-I Lee, Bih-Yaw Shih, Liang-Jung Tu. The Application of KANO's model for improving web-based learning performance [DB/OL]. http://fie.engrng.pitt.edu/fie2002/papers/1353.pdf.