TY  - JOUR
AU  - S. G. Kondratenya
TI  - Characterizations of the complexity of singular points of solutions to nonlinear systems of two differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1979
SP  - 1580
EP  - 1591
VL  - 15
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1979_15_9_a4/
LA  - ru
ID  - DE_1979_15_9_a4
ER  -