TY  - JOUR
AU  - O. A. Veliev
TI  - The spectrum and spectral singularities of differential operators with periodic complex-valued coefficients
JO  - Differencialʹnye uravneniâ
PY  - 1983
SP  - 1316
EP  - 1324
VL  - 19
IS  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1983_19_8_a3/
LA  - ru
ID  - DE_1983_19_8_a3
ER  -