TY - JOUR AU - S. P. Levashkin TI - Unimprovable derivative estimates of a solution of the Dirichlet problem for a biharmonic equation in bounded domains JO - Matematičeskie zametki PY - 1994 SP - 80 EP - 89 VL - 55 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1994_55_6_a7/ LA - ru ID - MZM_1994_55_6_a7 ER -