Grypeos, M.E., Koutroulos, C.G. and Papadopoulos, G.J. 2020. Approximate treatment of the Dirac equation with scalar and vector potentials of rectangular shapes. HNPS Advances in Nuclear Physics. 4, (Feb. 2020), 41–50. DOI:https://doi.org/10.12681/hnps.2873.