(1991). The problem of incomplete information in relational databases / G. Grahne.
Cita Chicago (17th ed.)The Problem of Incomplete Information in Relational Databases / G. Grahne. 1991.
Cita MLA (9th ed.)The Problem of Incomplete Information in Relational Databases / G. Grahne. 1991.
Atenció: Aquestes cites poden no estar 100% correctes.