Closed World Databases Opened Through Null Values
Georg Gottlob and Roberto Zicari
Book Title
Fourteenth International Conference on Very Large Data Bases‚ August 29 − September 1‚ 1988‚ Los Angeles‚ California‚ USA‚ Proceedings
Editor
François Bancilhon and David J. DeWitt
ISBN
0−934613−75−3
Pages
50−61
Publisher
Morgan Kaufmann
Year
1988