TY  - BOOK
AU  - Sewell,M.J.
ED  - University of Cambridge
TI  - Maximum and minimum principles: A unified approach, with applications 
SN  - 0521348765
AV  - QA316 S49
PY  - 1987///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Máximos y mínimos
ER  -