45 citations · 49 across the 4 of their papers we have counts for
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A. Martín-Ruiz, C. A. Escobar
The CPT-even sector of the standard model extension amounts to extending Maxwell electrodynamics by a gauge invariant term of the form $- \frac{1}{4} (k _{F}) _{αβμν} F ^{αβ} F ^{μ…