Mark Schmidt 0001 Glenn Fung Rómer Rosales Fast Optimization Methods for L1 Regularization: A Comparative Study and Two New Approaches. 286-297 2007 conf/ecml/2007 ECML https://doi.org/10.1007/978-3-540-74958-5_28 db/conf/ecml/ecml2007.html#SchmidtFR07