%0 Journal Article
%A K. I. Tyurin
%T Extremal properties of simple eigenvalues of the Laplace operator with Dirichlet boundary conditions on a ball
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 1991
%P 33-37
%N 4
%U http://geodesic.mathdoc.fr/item/VMUMM_1991_4_a7/
%G ru
%F VMUMM_1991_4_a7