TY  - JOUR
AU  - A. M. Il'in
TI  - A~boundary value problem for the elliptic equation of second order in a~domain with a~narrow slit. 1.~The two-dimensional case
JO  - Sbornik. Mathematics
PY  - 1976
SP  - 459
EP  - 480
VL  - 28
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1976_28_4_a1/
LA  - en
ID  - SM_1976_28_4_a1
ER  -