@article{12:87,author={Nicol Cesa-Bianchi and Shai Shalev-Shwartz and Ohad Shamir}, Title={Efficient Learning with Partially Observed Attributes},journal={Journal of Machine Learning Research},volume={12}, url={http://www.jmlr.org/papers/volume12/cesa-bianchi11a/cesa-bianchi11a.pdf}}