Simeonova, I. . (2025). CHALLENGES AND MEASURES FOR ADMINISTRATIVE SECURITY AT THE LOCAL LEVEL DURING THE INTRODUCTION OF THE EUROPEAN CURRENCY UNIT (EURO) IN BULGARIA: CHALLENGES AND MEASURES FOR ADMINISTRATIVE SECURITY AT THE LOCAL LEVEL DURING THE INTRODUCTION OF THE EUROPEAN CURRENCY UNIT (EURO) IN BULGARIA. JOURNAL SCIENTIFIC AND APPLIED RESEARCH, 29(1), 117–128. https://doi.org/10.46687/jsar.v29i1.461