Fatma Cemile Serçe Ferda Nur Alpaslan Lakhmi C. Jain Intelligent learning system for online learning. 129-141 2008 5 Int. J. Hybrid Intell. Syst. 3 http://iospress.metapress.com/content/b477777306h6511u/ db/journals/ijhis/ijhis5.html#SerceAJ08