Quantum aspects of the Lorentz symmetry violation on an electron in a nonuniform electric field A. S. Oliveira, K. Bakke and H. Belich Eur. Phys. J. Plus, 135 8 (2020) 623 Published online: 05 August 2020 DOI: 10.1140/epjp/s13360-020-00657-5