TY  - GEN
AU  - Nemyckij, V. V
AU  - Stepanov, V. V
TI  - Quaitative theory of differential equations
U1  - 517.9 
PY  - 1960///
CY  - Princeton, New Jersey
PB  - Princeton University Press
KW  - Teoria calitativa a ecuatiilor diferentiale
KW  - Ecuatii diferentiale
KW  - Sisteme dinamice
KW  - Invarianti integrali
N1  - Contine bibliogr., apendice si index dupa ambele parti
ER  -