%0 Journal Article
%A Yu. V. Egorov
%A V. A. Kondratiev
%T Estimation of the first eigenvalue of the Sturm--Liouville operator
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 1991
%P 5-11
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_1991_6_a1/
%G ru
%F VMUMM_1991_6_a1