Quantum deformation of the angular distributions of synchrotron radiation. Emission from particles in the first excited stateV.G. Bagrov, A.N. Burimova, D.M. Gitman and A.D. LevinEur. Phys. J. C, 72 2 (2012) 1871DOI: https://doi.org/10.1140/epjc/s10052-012-1871-y