Yankova-Yordanova, Yordanka, and Nikolay Yordanov. “HYBRID SPARE-PARTS LOGISTICS IN ENGINEERING SYSTEMS: A 3S MODEL FOR STORE, SOURCE, OR SYNTHESIZE DECISIONS: HYBRID SPARE-PARTS LOGISTICS IN ENGINEERING SYSTEMS: A 3S MODEL FOR STORE, SOURCE, OR SYNTHESIZE DECISIONS”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH 31, no. 1 (November 6, 2026): 141–144. Accessed November 7, 2026. https://jsar.ftn.shu.bg/index.php/jsar/article/view/512.