title: processing complex aggregate queries over data streams. authors: a dobra , m garofalakis , j gehrke , r rastogi. venue: sigmod conference. year: 2002
title: approximate frequency counts over data streams. authors: m charikar , k chen , m farach-colton. venue: in proc . of 29th int . colloq . on automata , languages and & hellip ; ,. year: nan