%0 Journal Article %A Werner Ballmann %A Mayukh Mukherjee %A Panagiotis Polymerakis %T On the Spectrum of Certain Hadamard Manifolds %J Symmetry, integrability and geometry: methods and applications %D 2023 %V 19 %U http://geodesic.mathdoc.fr/item/SIGMA_2023_19_a49/ %G en %F SIGMA_2023_19_a49