TY  - CHAP
A1  - Date, C.J.
A1  - Darwen, H.
A1  - Lorentzos, N.A.
T1  - Chapter 11: Integrity Constraints I: Candidate Keys and Related Constraints
Y1  - 2002a
T2  - Temporal Data and the Relational Model
CY  - San Francisco
PB  - Morgan Kaufmann
SP  - 187
EP  - -212

ER  -