LAWAL, Omotolani David; AJAYI, Oluwatumininu. E-Procurement Systems and Their Impact on Supply Chain Efficiency: A Comprehensive Analysis of the United States Market. Research Journal in Business and Economics, [S. l.], v. 1, n. 1, p. 75–87, 2025. DOI: 10.61424/rjbe.v1i1.388. Disponível em: https://www.bluemarkpublishers.net/index.php/RJBE/article/view/388. Acesso em: 15 sep. 2026.