TY  - BOOK
AU  - Nemytskii, V. V. 
AU  - Stepanov, V. V.
TI  - Qualitative theory of diferential equations
SN  - 0486659542
PY  - 1989///
CY  - New York : 
PB  - Dover, 
KW  - ECUACIONES DIFERENCIALES
ER  -