title: efficient approximation of optimization queries under parametric aggregation constraints s guha , d gunopulos , n koudas , d srivastava , m vlachos 2003. authors: nan. venue: vldb. year: nan
title: efficient approximation of optimization queries under parametric aggregation constraints s guha , d gunopulos , n koudas , d srivastava , m proceedings of the international conference on very large & hellip ; ,. authors: nan. venue: nan. year: 2003.0