This article is cited in 1 paper

Conditions for a center in the case of homogeneous nonlinearities of third degree

V. A. Lunkevich^a, K. S. Sibirskii<sup>b

a</sup> Mathematics Institute, Computer Center, Academy of Sciences of the Moldavian SSR
^b Chishinau Technical Institute

Received: 22.04.1965

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