TY - JOUR AU - A. M. Il'in TI - A boundary value problem for the second order elliptic equation in a domain with a narrow slit. 2. Domain with a small cavity JO - Sbornik. Mathematics PY - 1977 SP - 227 EP - 244 VL - 32 IS - 2 UR - http://geodesic.mathdoc.fr/item/SM_1977_32_2_a3/ LA - en ID - SM_1977_32_2_a3 ER -