Nonlinear dynamics in VCSELs driven by a sinusoidally modulated current and Rössler oscillator S. T. Kingni, J. H. Talla Mbé and P. Woafo Eur. Phys. J. Plus, 127 5 (2012) 46 Published online: 02 May 2012 DOI: 10.1140/epjp/i2012-12046-6