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@article{DE_1988_24_1_a11, author = {K. Yu. Kishkis}, title = {The index of the {Bitsadze--Samarski{\v\i}} problem for harmonic functions}, journal = {Differencialʹnye uravneni\^a}, pages = {105--110}, publisher = {mathdoc}, volume = {24}, number = {1}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1988_24_1_a11/} }
K. Yu. Kishkis. The index of the Bitsadze--Samarski{\v\i} problem for harmonic functions. Differencialʹnye uravneniâ, Tome 24 (1988) no. 1, pp. 105-110. http://geodesic.mathdoc.fr/item/DE_1988_24_1_a11/