%0 Journal Article
%A I. A. Shishmarev
%T Exact estimates of the eigenfunctions of the biharmonic operator
%J Doklady Akademii Nauk
%D 1966
%P 790-793
%V 170
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1966_170_4_a11/
%G ru
%F DAN_1966_170_4_a11