Theodore Johnson S. Muthukrishnan Vladislav Shkapenyuk Oliver Spatscheck Query-Aware Sampling for Data Streams. 664-673 2007 conf/icde/2007w ICDE Workshops http://dx.doi.org/10.1109/ICDEW.2007.4401053 db/conf/icde/icdew2007.html#JohnsonMSS07