%0 Journal Article %A V. V. Amel'kin %A V. Yu. Tyshchenko %T Isochronous centers and foci of two-dimensional holomorphic differential systems %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2024 %P 3-11 %N 11 %U http://geodesic.mathdoc.fr/item/IVM_2024_11_a0/ %G ru %F IVM_2024_11_a0