Subtleties in the beta-function calculation of supersymmetric gauge theoriesA. L. Cherchiglia, Marcos Sampaio, B. Hiller and A. P. Baêta ScarpelliEur. Phys. J. C, 76 2 (2016) 47DOI: https://doi.org/10.1140/epjc/s10052-015-3859-x