%0 Journal Article %A V. V. Napalkov %A I. A. Rudakov %T Differential operators in nonconvex domains %J Informatics and Automation %D 1991 %P 255-260 %V 200 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1991_200_a23/ %G ru %F TRSPY_1991_200_a23