%0 Journal Article %A A. A. Klyachin %T Estimation of the error of calculating the functional containing higher-order derivatives on a triangular grid %J Sibirskie èlektronnye matematičeskie izvestiâ %D 2019 %P 1856-1867 %V 16 %I mathdoc %U http://geodesic.mathdoc.fr/item/SEMR_2019_16_a119/ %G ru %F SEMR_2019_16_a119