TY  - BOOK
AU  - Nemytskii,V.V..
AU  - Stepanov,V.V..
TI  - Qualitative theory of differential equations / 
SN  - 0486659542
U1  - 515.35 
PY  - 1989///
CY  - New York : 
PB  - Dover Publications , 
KW  - DIFFERENTIAL EQUATIONS
N1  - NULL
ER  -