Lifshitz scaling in CPT-even Lorentz-violating electrodynamics and GRB time delay K. E. L. de Farias, T. A. M. Sampaio, M. A. Anacleto, F. A. Brito and E. Passos Eur. Phys. J. Plus, 136 2 (2021) 257 Published online: 24 February 2021 DOI: 10.1140/epjp/s13360-021-01228-y