%0 Journal Article %A V. G. Durnev %A A. I. Zetkina %T Violation of finite approximability for single-coefficient commutant equations %J Vestnik Tverskogo gosudarstvennogo universiteta. Seriâ Prikladnaâ matematika %D 2022 %P 5-13 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/VTPMK_2022_2_a0/ %G ru %F VTPMK_2022_2_a0