Differencialʹnye uravneniâ, Tome 26 (1990) no. 10, pp. 1743-1753
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A. P. Sadovskii. Conditions for the problem of the center and focus to arise for an $A_3$-system. Differencialʹnye uravneniâ, Tome 26 (1990) no. 10, pp. 1743-1753. http://geodesic.mathdoc.fr/item/DE_1990_26_10_a11/
@article{DE_1990_26_10_a11,
author = {A. P. Sadovskii},
title = {Conditions for the problem of the center and focus to arise for an $A_3$-system},
journal = {Differencialʹnye uravneni\^a},
pages = {1743--1753},
year = {1990},
volume = {26},
number = {10},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/DE_1990_26_10_a11/}
}
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AU - A. P. Sadovskii
TI - Conditions for the problem of the center and focus to arise for an $A_3$-system
JO - Differencialʹnye uravneniâ
PY - 1990
SP - 1743
EP - 1753
VL - 26
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