TY  - JOUR
AU  - Yu. V. Egorov
AU  - V. A. Kondrat'ev
TI  - An estimate for the first eigenvalue of the Sturm--Liouville operator
JO  - Vestnik Moskovskogo universiteta. Matematika, mehanika
PY  - 1990
SP  - 75
EP  - 78
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VMUMM_1990_6_a20/
LA  - ru
ID  - VMUMM_1990_6_a20
ER  -