%0 Journal Article %A K. Yu. Kishkis %T The index of the Bitsadze--Samarski{\v\i} problem for harmonic functions %J Differencialʹnye uravneniâ %D 1988 %P 105-110 %V 24 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1988_24_1_a11/ %G ru %F DE_1988_24_1_a11