Nonlinear analysis and analog simulation of a piezoelectric buckled beam with fractional derivative I. S. Mokem Fokou, C. Nono Dueyou Buckjohn, M. Siewe Siewe and C. Tchawoua Eur. Phys. J. Plus, 132 8 (2017) 344 Published online: 09 August 2017 DOI: 10.1140/epjp/i2017-11605-7