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2. A DBMS facility for handling engineering entities;Johnson,1983
3. Application of abstract data types and abstract indices to CAD databases;Stonebraker,1983
4. DAVID: design aids for VLSI using integrated databases;Katz;IEEE TC Database Engineering Bulletin,1982
5. Tornado: a database management system for graphics applications;Ulfsby;IEEE Comput. Graphics Appl.,1982