SIERRALTA RÍOS, Anibal. Los Contratos de “Commodities”. THEMIS Revista de Derecho, [S. l.], n. 25, p. 67–73, 1993. Disponível em: https://revistas.pucp.edu.pe/index.php/themis/article/view/11061. Acesso em: 27 dic. 2025.