Ping Li Trevor Hastie Kenneth Ward Church Nonlinear Estimators and Tail Bounds for Dimension Reduction in <i>l</i> <sub>1</sub> Using Cauchy Random Projections. 514-529 2007 conf/colt/2007 COLT http://dx.doi.org/10.1007/978-3-540-72927-3_37 db/conf/colt/colt2007.html#LiHC07