Quasinormal modes and hidden conformal symmetry in the Reissner–Nordström black hole Yong-Wan Kim, Yun Soo Myung and Young-Jai Park Eur. Phys. J. C, 73 5 (2013) 2440 Published online: 22 May 2013 DOI: 10.1140/epjc/s10052-013-2440-8