Superradiance of a global monopole in Reissner–Nordström(–AdS) space-time M. Haluk Seçuk and Özgür Delice Eur. Phys. J. C, 80 5 (2020) 396 Published online: 11 May 2020 DOI: 10.1140/epjc/s10052-020-7988-5