title: the database and information system research group at the university of ulm sigmod record. authors: peter dadam , wolfgang klas. venue: nan. year: 1997.0
title: information systems research at george mason university sushil jajodia , daniel barbar &#225; , alex brodsky , larry kerschberg , ami motro , edgar sibley , x. sean wang acm sigmod record. authors: nan. venue: nan. year: 1997.0