TY  - JOUR
AU  - A. V. Sobolev
AU  - V. A. Khatskevich
TI  - Definite invariant subspaces and the structure of the spectrum of a focusing plus-operator
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1981
SP  - 84
EP  - 85
VL  - 15
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1981_15_1_a14/
LA  - ru
ID  - FAA_1981_15_1_a14
ER  -