1-D Dirac equation in the presence of the Mathieu potential Sohrab Aghaei, Alireza Chenaghlou and Niloofar Azadi Eur. Phys. J. Plus, 136 7 (2021) 749 Published online: 12 July 2021 DOI: 10.1140/epjp/s13360-021-01726-z