Multiple-soliton and periodic solutions to space–time fractional Whitham–Broer–Kaup equationsHang Xu, Wenhao Cheng and Jifeng CuiEur. Phys. J. Spec. Top., 231 11-12 (2022) 2353-2357DOI: https://doi.org/10.1140/epjs/s11734-021-00374-9