%0 Journal Article
%A Beesack, Paul R.
%T Elementary Proofs of the Extremal Properties of the Eigenvalues of the Sturm-Liouville Equation
%J Canadian mathematical bulletin
%D 1960
%P 59-77
%V 3
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1960-010-3/
%R 10.4153/CMB-1960-010-3
%F 10_4153_CMB_1960_010_3