Multi-chimera states in a higher order network of FitzHugh–Nagumo oscillators Zhen Wang, Mingshu Chen, Xiaojian Xi, Huaigu Tian and Rui Yang Eur. Phys. J. Spec. Top., 233 4 (2024) 779-786 Published online: 14 March 2024 DOI: 10.1140/epjs/s11734-024-01143-0