The generation mechanism of rouge wave for (3 + 1)-dimensional Kudryashov–Sinelshchikov equation Wen-Tao Li and Xiao-Le Xu Eur. Phys. J. Plus, 138 3 (2023) 207 Published online: 04 March 2023 DOI: 10.1140/epjp/s13360-023-03801-z