%0 Journal Article %A V. N. Konovalov %T Precise inequalities for norms of functions, third partial, second mixed, or directional derivatives %J Matematičeskie zametki %D 1978 %P 67-78 %V 23 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1978_23_1_a7/ %G ru %F MZM_1978_23_1_a7