title: cost models do matter : providing cost information for diverse data sources in a federated system m roth , f ozcan , l haas vldb. authors: nan. venue: nan. year: 1999.0
title: matter : providing cost information for diverse data sources in a federated system m tork roth , f ozcan , l haas tech . report ibm rj # 10141 , feb. .. authors: nan. venue: nan. year: nan