Discovering and quantifying nontrivial fixed points in multi-field models A. Eichhorn, T. Helfer, D. Mesterházy and M. M. Scherer Eur. Phys. J. C, 76 2 (2016) 88 Published online: 19 February 2016 DOI: 10.1140/epjc/s10052-016-3921-3