TY  - JOUR
AU  - R. G. Dymanov
TI  - Singular points for two-dimensional systems of total differential equations in four-dimensional space
JO  - Differencialʹnye uravneniâ
PY  - 1968
SP  - 1835
EP  - 1841
VL  - 4
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1968_4_10_a7/
LA  - ru
ID  - DE_1968_4_10_a7
ER  -