Naturalness in low-scale SUSY models and “non-linear” MSSM I. Antoniadis, E. M. Babalic and D. M. Ghilencea Eur. Phys. J. C, 74 9 (2014) 3050 Published online: 25 September 2014 DOI: 10.1140/epjc/s10052-014-3050-9