A quasi-Newton approach to non-smooth convex optimization.

Jin Yu S. V. N. Vishwanathan Simon Günter Nicol N. Schraudolph A quasi-Newton approach to non-smooth convex optimization. 1216-1223 2008 ICML http://doi.acm.org/10.1145/1390156.1390309 conf/icml/2008 db/conf/icml/icml2008.html#YuVGS08