TY  - JOUR
AU  - A. S. Markus
TI  - Some tests of completeness of the system of root vectors of a linear operator and the summability of series in that system
JO  - Doklady Akademii Nauk
PY  - 1964
SP  - 753
EP  - 756
VL  - 155
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1964_155_4_a8/
LA  - ru
ID  - DAN_1964_155_4_a8
ER  -