%0 Journal Article
%A Swanson, C.A.
%T Asymptotic Variational Formulae for Eigenvalues
%J Canadian mathematical bulletin
%D 1963
%P 15-25
%V 6
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1963-004-9/
%R 10.4153/CMB-1963-004-9
%F 10_4153_CMB_1963_004_9