HAHN, F. An intellectual retrospect. PSL Quarterly Review, [S. l.], v. 47, n. 190, 2013. DOI: 10.13133/2037-3643/10527. Disponível em: https://rosa.uniroma1.it/rosa04/psl_quarterly_review/article/view/10527. Acesso em: 17 may. 2024.