TY  - BOOK
AU  - Oppenheim, A. V.
AU  - Schafer, R. W.
TI  - Discrete-time signal processing 
SN  - 013216292X
U1  - 621.38043 
PY  - 1989///
CY  - Englewood Cliffs
PB  - Prentice Hall
KW  - Discrete-time systems
ER  -