Trisamiyanto, Ferdinandus Danu, and Budi Susetyo. “Cost Optimization Through Value Engineering and Risk Analysis in Industrial Building Retrofitting Projects”. Journal La Multiapp 6, no. 6 (November 18, 2025): 1449-1471. Accessed July 5, 2026. https://www.newinera.com/index.php/JournalLaMultiapp/article/view/2515.