Higher-order one-loop contributions in Lorentz-breaking QED A. P. Baeta Scarpelli, L. C. T. Brito, J. C. C. Felipe, J. R. Nascimento and A. Yu. Petrov EPL, 123 2 (2018) 21001 Published online: 20 August 2018 DOI: 10.1209/0295-5075/123/21001