Ahmedova S. SECURE CROSS-BORDER INNOVATION CLUSTERS IN INDUSTRY 4.0: A MODEL AND EMPIRICAL STUDY OF THE BURGAS–EDIRNE REGION. SysTechDev [Internet]. 2026 Sep. 17 [cited 2026 Sep. 27];2:15-21. Available from: https://journal.etrconf.eu/std/article/view/67