(Internation Workshop on Novelty and Diversity in Recommender Systems) p29 http://www.cs.ucl.ac.uk/fileadmin/UCL-CS/research/Research_Notes/RN_11_21.pdf (Auralist: Introducing Serendipity into Music Recommendation ) P30 http://www.springerlink.com/content/978-3-540-78196-7/#section=239197...