TY  - JOUR
AU  - V. M. Kurbanov
TI  - On the Eigenvalue Distribution and a Bessel Property Criterion for Root Functions of a Differential Operator: I
JO  - Differencialʹnye uravneniâ
PY  - 2005
SP  - 464
EP  - 478
VL  - 41
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_2005_41_4_a3/
LA  - ru
ID  - DE_2005_41_4_a3
ER  -