On the Category of Weakly U-Complexes. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 13, n. 2, p. 323–345, 2020. DOI: 10.29020/nybg.ejpam.v13i2.3673. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3673.. Acesso em: 4 may. 2024.