NASTASE C, MUSCAL D. NEW APPROACHES TO VALUE CREATION IN THE TOURISM SECTOR - THE CIRCULAR ECONOMY. Studia UBB Negotia [Internet]. 2021 Sep. 30 [cited 2025 Jan. 10];66(3):19-32. Available from: https://studia.reviste.ubbcluj.ro/index.php/subbnegotia/article/view/254