Getting recommender systems to think outside the box.

Zeinab Abbassi Sihem Amer-Yahia Laks V. S. Lakshmanan Sergei Vassilvitskii Cong Yu Getting recommender systems to think outside the box. 285-288 2009 RecSys http://doi.acm.org/10.1145/1639714.1639769 conf/recsys/2009 db/conf/recsys/recsys2009.html#AbbassiALVY09