TY  - BOOK
AU  - Bogaevski V N
AU  -  Povzner A
TI  - Algebaric methods in nonlinear perturbation theory
T2  - Applied Mathematical Sciences; 88
U1  - B33,2:52, N1 
PY  - 1991///
CY  - New York    
PB  -  Springer Verlag       
ER  -