TY  - JOUR
AU  - A. Yu. Levin
AU  - Yu. I. Petunin
TI  - Some problems related to the concept of orthogonality in a Banach space
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1963
VL  - 18
IS  - 3
UR  - http://geodesic.mathdoc.fr/item/RM_1963_18_3_a7/
LA  - ru
ID  - RM_1963_18_3_a7
ER  -