TY  - BOOK
AU  - Franenkel L E
TI  - Introduction to maximum principles and symmetry in elliptic problems
SN  - 0-521-46195-2
U1  - 515.353 
PY  - 2000///
CY  - Cambridge
PB  - CUP
KW  - Elliptic partial differential equations
KW  - Symmetry(Mathematics)
ER  -