%0 Journal Article %A D. M. Lekveishvili %T Unimprovable estimates in Hölder spaces for generalized solutions of the Dirichlet problem for a class of fourth order elliptic equations %J Sbornik. Mathematics %D 1987 %P 429-446 %V 56 %N 2 %U http://geodesic.mathdoc.fr/item/SM_1987_56_2_a9/ %G en %F SM_1987_56_2_a9