@conference {kouki:recsys15, title = {HyPER: A Flexible and Extensible Probabilistic Framework for Hybrid Recommender Systems}, booktitle = {9th ACM Conference on Recommender Systems (RecSys)}, year = {2015}, publisher = {ACM}, organization = {ACM}, author = {Kouki, Pigi and Fakhraei, Shobeir and Foulds, James and Eirinaki, Magdalini and Lise Getoor} }