Anirban Dasgupta Petros Drineas Boulos Harb Ravi Kumar Michael W. Mahoney Sampling algorithms and coresets for &ell;<sub><i>p</i></sub> regression. 932-941 2008 SODA http://doi.acm.org/10.1145/1347082.1347184 conf/soda/2008 db/conf/soda/soda2008.html#DasguptaDHKM08