Simeonova I. 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. JSAR [Internet]. 2025 Nov. 16 [cited 2025 Dec. 6];29(1):117-28. Available from: https://jsar.ftn.shu.bg/index.php/jsar/article/view/461