• "Improving Collaborative Filtering Recommendations Using External Data." IEEE International Conference on Data Mining, December 2008 (with A. Umyarov)

• "The Long Tail of Recommender Systems and How to Leverage It." ACM Conference on Recommender Systems, October 2008 (with Y-J Park)

• "Leveraging Aggregate Ratings for Better Recommendations", ACM Conference on Recommender Systems, November, 2007 (with A. Umyarov)
  
  
• "Incorporating Contextual Information in Recommender Systems Using a Multidimensional Approach". ACM Transactions on Information Systems, 23(1), January 2005 (with G. Adomavicius, R. Sankaranarayanan and S. Sen). [pdf]
  
  
• "Towards the Next Generation of Recommender Systems: A Survey of the State-of-the-Art and Possible Extensions." IEEE Transactions on Knowledge and Data Engineering, 17(6), June 2005, (with G. Adomavicius).[pdf]
  
  
• Multidimensional Recommender Systems: A Data Warehousing Approach." In Proceedings of the WECOM 2001 Conference, Lecture Notes in Computer Science 2232, pp. 180 - 192, Springer-Verlag, 2001 (with G. Adomavicius).