1. ADL. (2009). Retrieved from http://www.adlnet.org
2. Intelligent agents as cognitive tools for education.;A.Baylor;Educational Technology,1999
3. From adaptive hypermedia to the adaptive web.;P.Brusilovski;Communications of the ACM,2002
4. The Construction and Application of Student Models in Intelligent Tutoring Systems.;P.Brusilovsky;Journal of Computer and Systems Sciences International,1994
5. CEN/ISSS LTW. (2009). Retrieved from http://www.cenorm.be/isss