An empirical evaluation of learner performance in e-learning recommender systems and an adaptive hypermedia system by Ghauth, K.I., Abdullah, N.A.

Learning materials recommendation using good learners ratings and content-based filtering by Ghauth, K.I., Abdullah, N.A.

The effect of incorporating good learners' ratings in e-learning content-based recommender system by Ghauth, K.I., Abdullah, N.A.