TY  - JOUR
AU  - N. V. Marchenko
TI  - On the extension of an operator and the existence of fixed points
JO  - Doklady Akademii Nauk
PY  - 1962
SP  - 1026
EP  - 1028
VL  - 147
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1962_147_5_a9/
LA  - ru
ID  - DAN_1962_147_5_a9
ER  -