Lawal OD, Ajayi O. E-Procurement Systems and Their Impact on Supply Chain Efficiency: A Comprehensive Analysis of the United States Market. RJBE [Internet]. 2025 Aug. 13 [cited 2026 Sep. 16];1(1):75-87. Available from: https://www.bluemarkpublishers.net/index.php/RJBE/article/view/388