TY  - JOUR
AU  - S. G. Kondratenya
AU  - A. I. Yablonskii
TI  - The singular points of the solution of systems of second order differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1970
SP  - 1970
EP  - 1975
VL  - 6
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1970_6_11_a4/
LA  - ru
ID  - DE_1970_6_11_a4
ER  -