Perturbative and nonperturbative quasinormal modes of 4D Einstein–Gauss–Bonnet black holesAlmendra Aragón, Ramón Bécar, P. A. González and Yerko VásquezEur. Phys. J. C, 80 8 (2020) 773DOI: https://doi.org/10.1140/epjc/s10052-020-8298-7