%0 Journal Article
%A A. Weinstein
%T The intermediate problems and the maximum-minimum theory of eigenvalues
%J Matematika
%D 1964
%P 91-101
%V 8
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAT_1964_8_5_a8/
%G ru
%F MAT_1964_8_5_a8