TY  - JOUR
AU  - V. K. Romanko
TI  - On the theory of operators of the form $\frac{d^m}{dt^m}-A$
JO  - Differencialʹnye uravneniâ
PY  - 1967
SP  - 1957
EP  - 1970
VL  - 3
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1967_3_11_a10/
LA  - ru
ID  - DE_1967_3_11_a10
ER  -