Ernawati, D. ., and Y. C. . Winursito. “Supply Chain System Analysis in Single Vendor and Multi Retailer to Reduce Bullwhip Effect Using Vendor Managed Inventory (VMI) Method at Company X”. Nusantara Science and Technology Proceedings, vol. 2023, no. 36, Dec. 2023, pp. 264-8, doi:10.11594/nstp.2023.3638.