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: optimization of constrained frequent set queries : 2-var constraints. authors: lvs lakshmanan , r ng , j han , a pang. venue: 3rd sigmodâ ?? 98 workshop on research issues in data mining. year: nan