TY  - BOOK
AU  - Protter M H
AU  -  Weinberger H F
TI  - Maximum principles in differential equations
T2  - Prentice-hall partial differential equation series
U1  - B334, M4;1 
PY  - 1984///
CY  - New York    
PB  -  Springer-Verleg        
KW  - Mathematics
ER  -