N. Idris, S. Z. Mohd Hashim, R. Samsudin, and N. B. Hj Ahmad, “Intelligent Learning Model Based On Significant Weight Of Domain Knowledge Concept For Adaptive E-Learning”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 7, no. 4-2, pp. 1486–1491, Sep. 2017.