Maria-Florina Balcan Nikhil Bansal Alina Beygelzimer Don Coppersmith John Langford Gregory B. Sorkin Robust Reductions from Ranking to Classification. 604-619 2007 conf/colt/2007 COLT http://dx.doi.org/10.1007/978-3-540-72927-3_43 db/conf/colt/colt2007.html#BalcanBBCLS07