Solutions of the Dirac and Schrödinger equations with shifted Tietz-Wei potential U. S. Okorie, E. E. Ibekwe, M. C. Onyeaju and A. N. Ikot Eur. Phys. J. Plus, 133 10 (2018) 433 Published online: 23 October 2018 DOI: 10.1140/epjp/i2018-12307-4