TONON, Luis; GARCÍA, Paulo. Application Of A Gravity Model To The Bilateral Trade Between Ecuador And Germany. UDA AKADEM, [S. l.], v. 1, n. 3, p. 115–131, 2019. Disponível em: https://revistas.uazuay.edu.ec/index.php/udaakadem/article/view/205. Acesso em: 28 nov. 2025.