Dynamics of a vibrational energy harvester with a bistable beam: voltage response identification by multiscale entropy and “0-1” testP. Harris, C. R. Bowen, H. A. Kim and G. LitakEur. Phys. J. Plus, 131 4 (2016) 109DOI: https://doi.org/10.1140/epjp/i2016-16109-4