Elastic and inelastic collisions in the (2 + 1)-dimensional modified dispersive water wave equation Qing-Jiang Feng and Guo-Qing Zhang Eur. Phys. J. Plus, 140 5 (2025) 386 Published online: 13 May 2025 DOI: 10.1140/epjp/s13360-025-06322-z