Conservation Laws and Symmetry Multi-Reductions of Two (2 + 1)-Dimensional Equations: The Zakharov-Kuznetsov (ZK) Equation and a Nonlinear Wave Equation. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 18, n. 1, p. 5371, 2025. DOI: 10.29020/nybg.ejpam.v18i1.5371. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/5371. Acesso em: 5 dec. 2025.