Graham Cormode Minos N. Garofalakis S. Muthukrishnan Rajeev Rastogi Holistic Aggregates in a Networked World: Distributed Tracking of Approximate Quantiles. 2005 conf/sigmod/2005 SIGMOD Conference db/conf/sigmod/sigmod2005.html#CormodeGMR05 25-36 http://doi.acm.org/10.1145/1066157.1066161