SUSY partners and S-matrix poles of the one-dimensional Rosen–Morse II potential Carlos San Millán, Manuel Gadella, Şengül Kuru and Javier Negro Eur. Phys. J. Plus, 138 9 (2023) 857 Published online: 27 September 2023 DOI: 10.1140/epjp/s13360-023-04338-x