TY  - JOUR
AU  - S. G. Kondratenya
AU  - A. I. Yablonskii
TI  - Mobile singularities of systems of two differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1968
SP  - 983
EP  - 990
VL  - 4
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1968_4_6_a2/
LA  - ru
ID  - DE_1968_4_6_a2
ER  -