title: engineering federated information systems : report of efis '99 workshop. authors: s conrad , w hasselbring , u hohenstein , r kutsche , m roantree , g saake , f saltor. venue: sigmod record. year: 1999
title: engineering federated information systems : report of eefis '99 workshop. authors: s conrad , w hasselbring , u hohenstein , rd kutsche ,. venue: acm sigmod record ,. year: 1999.0