TY  - JOUR
AU  - S. A. Nazarov
TI  - `Far interaction' of small spectral perturbations of the Neumann boundary conditions for an elliptic system of differential equations in a three-dimensional domain
JO  - Sbornik. Mathematics
PY  - 2023
SP  - 58
EP  - 107
VL  - 214
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/SM_2023_214_1_a3/
LA  - en
ID  - SM_2023_214_1_a3
ER  -