title: online query processing. authors: peter j. haas , joseph m. hellerstein. venue: sigmod conference. year: 2001
title: low-cost compensation-based query processing. authors: &#216; ystein gr &#248; vlen , svein-olaf hvasshovd , &#216; ystein torbj &#248; rnsen. venue: very large data bases. year: 1998