Marc Najork Sreenivas Gollapudi Rina Panigrahy Less is more: sampling the neighborhood graph makes SALSA better and faster. 242-251 2009 WSDM http://doi.acm.org/10.1145/1498759.1498832 conf/wsdm/2009 db/conf/wsdm/wsdm2009.html#NajorkGP09