TY  - BOOK
AU  - Varga, Richard S.
TI  - Gersgorin and his circles: Richard S. Varga
T2  - Bank, R. 
SN  - 9783540211006
U1  - 512.943 V4261g 
PY  - 2004///
CY  - New York
PB  - Springer
KW  - Eigenvalues
ER  -