%0 Journal Article %A Carlson, Robert %T Nonclassical Sturm-Liouville problems and Schrödinger operators on radial trees %J Electronic Journal of Differential Equations %D 2000 %V 2000 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2000__2000__a195/ %G en %F EJDE_2000__2000__a195