Degenerate wave-like solutions to the Dirac equation for massive particles Georgios N. Tsigaridas, Aristides I. Kechriniotis, Christos A. Tsonos and Konstantinos K. Delibasis EPL, 142 5 (2023) 50001 Published online: 30 May 2023 DOI: 10.1209/0295-5075/acd473