TY  - JOUR
AU  - A. N. Erugin
TI  - Analytic structure of the solution of a differential equation with nonholomorphic right side in the case of a center or focus
JO  - Differencialʹnye uravneniâ
PY  - 1966
SP  - 934
EP  - 942
VL  - 2
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1966_2_7_a7/
LA  - ru
ID  - DE_1966_2_7_a7
ER  -