%0 Journal Article %A O. V. Solonukha %T On the existence of time-periodic solutions of nonlinear parabolic differential equations with nonlocal boundary conditions of the %J Contemporary Mathematics. Fundamental Directions %D 2023 %P 712-725 %V 69 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2023_69_4_a10/ %G ru %F CMFD_2023_69_4_a10