The Model for Decreasing the Costs in Supply Chain with Importance of Suppliers. Global Journal of Human-Social Science, [S. l.], v. 14, n. E1, p. 31–41, 2014. Disponível em: https://www.socialscienceresearch.org/index.php/GJHSS/article/view/956. Acesso em: 30 sep. 2026.