TY  - BOOK
AU  - Levinson,Norman
TI  - Gap and density theorems / 
T2  - American Mathematical Society Colloquium Publications. 
PY  - 1940///
CY  - New York : 
PB  - American Mathematical Society, 
KW  - SERIES DE FOURIER
KW  - ECUACIONES INTEGRALES
KW  - VARIABLES COMPLEJAS
ER  -