1. Issues in software maintenance;Lientz;Comput. Sum.,1983
2. Measuring schema evolution;Sjøberg,1992
3. Quantifying schema evolution;Sjøberg;Inf. Soft. Technol.,1993
4. DBMS research at the crossroads: the Vienna update;Stonebraker,1993
5. Predictions and challenges for database systems in the year 2000;Selinger,1993