TY  - BOOK
AU  - NemytskiÄ­,V.V.
AU  - Stepanov,V.V.
TI  - Qualitative theory of differential equations
T2  - Princeton mathematical series
U1  - 515.35 20
PY  - 1960///
CY  - Princeton
PB  - Princeton University Press
KW  - Differential equations
ER  -