On the spinor representation J. M. Hoff da Silva, C. H. Coronado Villalobos, Roldão da Rocha and R. J. Bueno Rogerio Eur. Phys. J. C, 77 7 (2017) 487 Published online: 21 July 2017 DOI: 10.1140/epjc/s10052-017-5035-y