%0 Journal Article %A M. V. Suchkov %T The localization principle for the Laplace operator with piecewise constant coefficients on the surface of discontinuity of coefficients %J Differencialʹnye uravneniâ %D 1980 %P 2050-2061 %V 16 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1980_16_11_a15/ %G ru %F DE_1980_16_11_a15