TY  - JOUR
AU  - A. G. Eliseev
AU  - S. A. Lomov
TI  - The theory of singular perturbations in the case of spectral singularities of a~limit operator
JO  - Sbornik. Mathematics
PY  - 1988
SP  - 541
EP  - 555
VL  - 59
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1988_59_2_a16/
LA  - en
ID  - SM_1988_59_2_a16
ER  -