On the duality in CPT-even Lorentz-breaking theories A. P. Baêta Scarpelli, R. F. Ribeiro, J. R. Nascimento and A. Yu. Petrov Eur. Phys. J. C, 75 7 (2015) 314 Published online: 08 July 2015 DOI: 10.1140/epjc/s10052-015-3537-z