Solórzano, R. A. R.. Money before coinage. History of pre-columbian currency. REVISTA PROCESOS DE MERCADO, [S. l.], v. 13, n. 2, p. 411–427, 2016. DOI: 10.52195/pm.v13i2.121. Disponível em: https://procesosdemercado.com/revista/2016/vol-13/num-2/money-before-coinage-history-of-pre-columbian-currency. Acesso em: 31 mar. 2026.