%0 Journal Article
%A Littlejohn, L.L.
%A Zettl, A.
%T Left-definite variations of the classical Fourier expansion theorem
%J Electronic transactions on numerical analysis
%D 2007
%P 124-139
%V 27
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ETNA_2007__27__a3/
%G en
%F ETNA_2007__27__a3