TY  - JOUR
AU  - V. S. Mokeichev
TI  - Perturbation theory in a nonselfadjoint special case
JO  - Issledovaniya po Prikladnoi Matematike i Informatike
PY  - 1992
SP  - 81
EP  - 89
VL  - 19
IS  - 19
UR  - http://geodesic.mathdoc.fr/item/KUIPM_1992_19_19_a9/
LA  - ru
ID  - KUIPM_1992_19_19_a9
ER  -