SIGAUD, Lygia. "If I knew": gifts, debts and their equivalence. RURIS (Campinas, Online), Campinas, SP, v. 1, n. 2, 2012. DOI: 10.53000/rr.v1i2.655. Disponível em: https://econtents.bc.unicamp.br/inpec/index.php/ruris/article/view/16774. Acesso em: 17 may. 2024.