TY  - JOUR
AU  - B. T. Bilalov
TI  - Bases of Exponentials, Cosines, and Sines Formed by Eigenfunctions of Differential Operators
JO  - Differencialʹnye uravneniâ
PY  - 2003
SP  - 619
EP  - 623
VL  - 39
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_2003_39_5_a4/
LA  - ru
ID  - DE_2003_39_5_a4
ER  -