TY  - JOUR
AU  - Kh. K. Ishkin
TI  - Necessary Conditions for the Localization of the Spectrum of the Sturm--Liouville Problem on a Curve
JO  - Matematičeskie zametki
PY  - 2005
SP  - 72
EP  - 84
VL  - 78
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2005_78_1_a7/
LA  - ru
ID  - MZM_2005_78_1_a7
ER  -