Koby Crammer Ofer Dekel Joseph Keshet Shai Shalev-Shwartz Yoram Singer Online Passive-Aggressive Algorithms. 551-585 2006 7 Journal of Machine Learning Research http://www.jmlr.org/papers/v7/crammer06a.html db/journals/jmlr/jmlr7.html#CrammerDKSS06