Jeffrey Shneidman Peter R. Pietzuch Matt Welsh Margo I. Seltzer Mema Roussopoulos A Cost-Space Approach to Distributed Query Optimization in Stream Based Overlays. 1182 2005 ICDE Workshops http://doi.ieeecomputersociety.org/10.1109/ICDE.2005.161 db/conf/icde/icdew2005.html#ShneidmanPWSR05