TY  - BOOK
AU  - Davies,E.B
TI  - Spectral theory and differential operators
SN  - 0521587107
U1  - 515.7242 D2865 
PY  - 1996///
CY  - Cambridge
PB  - Cambridge University
KW  - Mathematics
KW  - Spectral theory
KW  - Elliptic operators
ER  -