Black holes and nilmanifolds: quasinormal modes as the fingerprints of extra dimensions? Anna Chrysostomou, Alan Cornell, Aldo Deandrea, Étienne Ligout and Dimitrios Tsimpis Eur. Phys. J. C, 83 4 (2023) 325 Published online: 25 April 2023 DOI: 10.1140/epjc/s10052-023-11496-w