TY  - BOOK
AU  - Colojoara A
AU  -  Foias C
TI  - Theory of generalized spectral operators
T2  - Mathematics and its applications; 9
U1  - B48, K81 
PY  - 1968///
CY  - New York    
PB  -  Gordan and Breach      
KW  -  Finite difference
KW  -  REF calculus
KW  - Mathematics
ER  -