title: towards a theory of cost management for digital libraries and electronic commerce. authors: a sistla , o wolfson , y yesha , r sloan. venue: acm trans . database syst .. year: 1998
title: towards a theory of cost management for digital libraries and electronic commerce. authors: ap sistla , o wolfson , y yesha , rh sloan. venue: acm transactions on database systems ,. year: 1998.0