%0 Journal Article %A S. P. Levashkin %T Unimprovable derivative estimates of a solution of the Dirichlet problem for a biharmonic equation in bounded domains %J Matematičeskie zametki %D 1994 %P 80-89 %V 55 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1994_55_6_a7/ %G ru %F MZM_1994_55_6_a7