%0 Journal Article %A Brigitte Beekmann %A Hermann Lökes %T Estimates for the Eigenvalues of Hill's Equation and Applications for the Eigenvalues of the Laplacian on Toroidal Surfaces. %J Manuscripta mathematica %D 1990 %P 295-308 %V 68 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1990__68_2_155528/ %F MM2_1990__68_2_155528