Shai Shalev-Shwartz Yoram Singer A Unified Algorithmic Approach for Efficient Online Label Ranking. 452-459 2007 2 Journal of Machine Learning Research - Proceedings Track http://www.jmlr.org/proceedings/papers/v2/shalev-shwartz07a.html db/journals/jmlr/jmlrp2.html#Shalev-ShwartzS07