%0 Journal Article
%A Yu. V. Egorov
%A V. A. Kondrat'ev
%T An estimate for the first eigenvalue of the Sturm--Liouville operator
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 1990
%P 75-78
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_1990_6_a20/
%G ru
%F VMUMM_1990_6_a20