THE IMPACT OF BPR ON INCREASING THE EFFECTS OF AD VALOREM TAXES AND THE ROLE OF THE BUSINESS PLAN IN MAINTAINING MONOPOLY EQUILIBRIUM AND MARKET POWER. es [Internet]. 2026 Jul. 13 [cited 2026 Jul. 13];21(1):21-34. Available from: https://esignali.edu.rs/index.php/es/article/view/331