Scattering of Ricci scalar perturbations from Schwarzschild black holes in modified gravity Dan B. Sibandze, Rituparno Goswami, Sunil D. Maharaj, Anne Marie Nzioki and Peter K. S. Dunsby Eur. Phys. J. C, 77 6 (2017) 364 Published online: 31 May 2017 DOI: 10.1140/epjc/s10052-017-4936-0