Quasinormal modes of three 
-dimensional black holes in string theory, conformal gravity, and Hu–Sawicki F(R) theory via the Heun function
and
Eur. Phys. J. C, 84 12 (2024) 1283
Published online: 11 December 2024
DOI: 10.1140/epjc/s10052-024-13655-z