TY  - JOUR
AU  - K. Yu. Kishkis
TI  - Letter to the editors: “The index of the Bitsadze–Samarskiǐ problem for harmonic functions” [Differentsial'nye Uravneniya 24 (1988), no. 1, 105–110; MR0930160]
JO  - Differencialʹnye uravneniâ
PY  - 1989
SP  - 546
VL  - 25
IS  - 3
UR  - http://geodesic.mathdoc.fr/item/DE_1989_25_3_a28/
LA  - ru
ID  - DE_1989_25_3_a28
ER  -