Haralampiev, Kaloyan, and Dimitar Blagoev. “In Search of Lost Ethnicity: Research Problems and Solutions”. Vanguard Scientific Instruments in Management 8, no. 8 (February 2, 2023). Accessed April 10, 2026. https://vsim-journal.info/index.php?journal=vsim&page=article&op=view&path[]=392.