Nonlinear dynamics of galloping-based piezoaeroelastic energy harvesters A. Abdelkefi, Z. Yan and M.R. Hajj Eur. Phys. J. Special Topics, 222 7 (2013) 1483-1501 Published online: 30 September 2013 DOI: 10.1140/epjst/e2013-01940-x