A viscoelastic energy harvester: probabilistic and bifurcation analysis Yong-Ge Yang, Shu-Ling Guo and Ya-Hui Sun Eur. Phys. J. Plus, 137 9 (2022) 1091 Published online: 28 September 2022 DOI: 10.1140/epjp/s13360-022-03303-4