Role of the tuning parameter at magnetic quantum phase transitions V. Fritsch, O. Stockert, C.-L. Huang, N. Bagrets, W. Kittler, C. Taubenheim, B. Pilawa, S. Woitschach, Z. Huesges, S. Lucas et al. (3 more) Eur. Phys. J. Special Topics, 224 6 (2015) 997-1019 Published online: 22 July 2015 DOI: 10.1140/epjst/e2015-02443-6