%0 Journal Article %A Nguen Tkhan' Nam %T A problem with an oblique derivative for a second-order equation in a domain with edges %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1989 %P 67-69 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_1989_5_a16/ %G ru %F VMUMM_1989_5_a16