Paul Beame Dang-Trinh Huynh-Ngoc On the Value of Multiple Read/Write Streams for Approximating Frequency Moments. 2008 15 Electronic Colloquium on Computational Complexity (ECCC) http://eccc.hpi-web.de/eccc-reports/2008/TR08-024/index.html 024 db/journals/eccc/eccc15.html#BeameH08