Multivariate empirical mode decomposition and multiscale entropy analysis of EEG signals from SSVEP-based BCI systemZhong-Ke Gao, Jun Zhang, Wei-Dong Dang, Yu-Xuan Yang, Qing Cai, Chao-Xu Mu and Celso GrebogiEPL, 122 4 (2018) 40010DOI: https://doi.org/10.1209/0295-5075/122/40010