1. Recommender system application developments: A survey;Lu;Decis. Support Syst.,2015
2. Recommender systems in technology enhanced learning;Manouselis,2011
3. Introduction to Recommender Systems Handbook;Ricci,2011
4. O’Brien, Jeffrey, The race to create a śmart’ Google, (2006). http://money.cnn.com/magazines/fortune/fortunearchive/2006/11/27/8394347/index.htm?section=money_latest.
5. Evaluating recommender systems for technology enhanced learning: A quantitative survey;Erdt;IEEE Trans. Learn. Technol.,2015