Andean regulations and border asymmetries Tulcán - Ecuador and Ipiales- Colombia. Business Vision, [S. l.], n. 9, p. 52–67, 2019. DOI: 10.32645/13906852.869. Disponível em: https://www.revistasdigitalesupeceduec35.biteca.online/index.php/visionempresarial/article/view/869. Acesso em: 13 apr. 2026.