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    • Centers and isochronous centers for generalized quintic systems 

      Giné, Jaume; Llibre, Jaume; Valls, Claudia (Elsevier, 2015)
      In this paper we classify the centers and the isochronous centers of certain polynomial differential systems in R2 of degree d≥5 odd that in complex notation are ż=(λ+i)z(zz̄)d−52(Az5+Bz4z̄+Cz3z̄2+Dz2z̄3+Ezz̄4+Fz̄5), ...