Classification of Four Dimensional Train Algebras of Degree 2 and Exponent 4. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 15, n. 4, p. 1887–1907, 2022. DOI: 10.29020/nybg.ejpam.v15i4.4586. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/4586. Acesso em: 22 dec. 2024.