title: a simple algorithm for finding frequent elements in streams and bags. authors: scott shenker , christos h. papadimitriou , richard m. karp. venue: acm trans . database syst .. year: 2003
title: a simple algorithm for finding frequent elements in streams and bags. authors: richard m. karp , scott shenker , christos h. papadimitriou. venue: acm transactions on database systems ( tods ). year: 2003