@article{10:29,author={Jacob Abernethy and Francis Bach and Theodoros Evgeniou and Jean-Philippe Vert}, Title={A New Approach to Collaborative Filtering: Operator Estimation with Spectral Regularization},journal={Journal of Machine Learning Research},volume={10}, url={http://www.jmlr.org/papers/volume10/abernethy09a/abernethy09a.pdf}}