Holenko Dlab, Martina, and Nataša Hoić-Božić. “An Approach to Adaptivity and Collaboration Support in a Web-Based Learning Environment”. International Journal of Emerging Technologies in Learning (iJET), vol. 4, no. 7, Nov. 2009, pp. pp. 28-30, doi:10.3991/ijet.v4i7.1071.