@article{SIGMA_2023_19_a49,
     author = {Werner Ballmann and Mayukh Mukherjee and Panagiotis Polymerakis},
     title = {On the {Spectrum} of {Certain} {Hadamard} {Manifolds}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2023},
     volume = {19},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2023_19_a49/}
}