Marchev, A., A. Marchev Jr., M. Harizanova, M. Mirchev, M. Alexandrova, M. Lambovska, and V. Alexandria. “Title Pages /Vol 2 (2010)”. Vanguard Scientific Instruments in Management, Vol. 2, no. 2, Apr. 2026, pp. 1-9, https://www.vsim-journal.info/index.php?journal=vsim&page=article&op=view&path[]=685.