A three-port switch NMR laser chaotic system with memristor and its circuit implementationJieyang Wang, Jun Mou, Huizhen Yan, Xingce Liu, Yanjie Ma and Yinghong CaoEur. Phys. J. Plus, 136 11 (2021) 1112DOI: https://doi.org/10.1140/epjp/s13360-021-02097-1