Response analysis of a nonlinear magnetoelectric energy harvester under harmonic excitationS. Naifar, S. Bradai, C. Viehweger and O. KanounEur. Phys. J. Special Topics, 224 14-15 (2015) 2897-2907DOI: https://doi.org/10.1140/epjst/e2015-02596-2