Syafitri, Annisa Maudi, and Farida Pulansari. “Study of Material Flow Analysis Mapping in Supply Management Chain for the Management of Non Functional Device Transformers”. Journal La Multiapp 6, no. 6 (December 30, 2025): 1656-1670. Accessed May 19, 2026. https://newinera.com/index.php/JournalLaMultiapp/article/view/2277.