TY  - JOUR
AU  - V. A. Erovenko
TI  - Application of the abstract theory of perturbations to the investigation of essential spectra of ordinary differential operators in $L^p$
JO  - Differencialʹnye uravneniâ
PY  - 1997
SP  - 867
EP  - 875
VL  - 33
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1997_33_7_a0/
LA  - ru
ID  - DE_1997_33_7_a0
ER  -