MEDINA ALCÁNTARA, Esteban. Cooperation according to Piaget: an experimental computer study among Veracruz men of different ages. Ra Ximhai, [S. l.], v. 17, n. 1, p. 53–70, 2021. DOI: 10.35197/rx.17.01.2021.03.em. Disponível em: https://raximhai.uaim.edu.mx/index.php/rx/article/view/98. Acesso em: 12 nov. 2026.