TY  - CHAP
A1  - Date, C.J.
A1  - Darwen, H.
A1  - Lorentzos, N.A.
T1  - Chapter 12: Integrity Constrains II: General Constraints
Y1  - 2002b
T2  - Temporal Data and the Relational Model
CY  - San Francisco
PB  - Morgan Kaufmann
SP  - 213
EP  - -244

ER  -