TY  - JOUR
AU  - N. B. Medvedeva
TI  - The problem of distinguishing between a~centre and a~focus in the space of vector fields with given Newton diagram
JO  - Sbornik. Mathematics
PY  - 2020
SP  - 1399
EP  - 1446
VL  - 211
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2020_211_10_a2/
LA  - en
ID  - SM_2020_211_10_a2
ER  -