Stability and synchronization of fractional-order complex-valued neural networks with time delay: LMI approachK. Udhayakumar, R. Rakkiyappan and G. VelmuruganEPJ - Special Topics, 226 16-18 (2017) 3639-3655DOI: https://doi.org/10.1140/epjst/e2018-00066-0