Saharon Rosset Grzegorz Swirszcz Nathan Srebro Ji Zhu <i>l</i><sub>1</sub> Regularization in Infinite Dimensional Feature Spaces. 544-558 2007 conf/colt/2007 COLT http://dx.doi.org/10.1007/978-3-540-72927-3_39 db/conf/colt/colt2007.html#RossetSSZ07