TY  - BOOK
AU  - Bluman George W
AU  -  Kumei Sukeyuki
TI  - Symmetric and differential equations
T2  - Applied mathematical sciences; 81
U1  - B33, M9 
PY  - 1989///
CY  - New York    
PB  -  Springer Verlag       
KW  -  Lie groups
KW  - Differential equations
ER  -