Dirac-like Hamiltonians associated to Schrödinger factorizations D. Demir Kızılırmak, Ş. Kuru and J. Negro Eur. Phys. J. Plus, 136 6 (2021) 668 Published online: 17 June 2021 DOI: 10.1140/epjp/s13360-021-01642-2