TY  - BOOK
AU  - Ludyk, Gunter 
TI  - Time-variant discrete-time systems
SN  - 3-528-08496-0
U1  - 621.3822 
PY  - 1981///
CY  - Berlin
PB  - Friedr
KW  - Communications engineering
KW  - Signal processing
N1  - Includes index
ER  -