CARLI, G. E.P.U. problems. PSL Quarterly Review, [S. l.], v. 4, n. 19, 2014. DOI: 10.13133/2037-3643/12705. Disponível em: https://rosa.uniroma1.it/rosa04/psl_quarterly_review/article/view/12705. Acesso em: 16 apr. 2025.