Taufik Sutisna, Eko, and Liane Okdinawati. “Lead-Time Variability and Single-Source Dependence As Continuity Risks in an Aerospace Metallic Raw-Material Supply Network”. Journal Research of Social Science, Economics, and Management, vol. 5, no. 12, July 2026, pp. 13229-3, doi:10.59141/jrssem.v5i12.1597.