TY  - JOUR
AU  - V. G. Krotov
TI  - When is an Orthogonal Series a Fourier Series?
JO  - Matematičeskie zametki
PY  - 2003
SP  - 139
EP  - 142
VL  - 74
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2003_74_1_a15/
LA  - ru
ID  - MZM_2003_74_1_a15
ER  -