Perturbations in non-flat cosmology for f(T) gravity Sebastian Bahamonde, Konstantinos F. Dialektopoulos, Manuel Hohmann, Jackson Levi Said, Christian Pfeifer and Emmanuel N. Saridakis Eur. Phys. J. C, 83 3 (2023) 193 Published online: 06 March 2023 DOI: 10.1140/epjc/s10052-023-11322-3