title: research issues in federated database systems : report of efdbs '97 workshop. authors: fèlix saltor , mark roantree , mark w. w. vermeer , wilhelm hasselbring , martin schönhoff , markus strässler , barry eaglestone , stefan conrad. venue: sigmod record. year: 1997
title: advances in real-time database systems research. authors: azer bestavros. venue: acm sigmod record. year: 1996