Non-Abelian aether-like term in four dimensionsA. J. G. Carvalho, D. R. Granado, J. R. Nascimento and A. Yu. PetrovEur. Phys. J. C, 79 10 (2019) 817DOI: https://doi.org/10.1140/epjc/s10052-019-7342-y