IVANOVA, Vania; SLAVOVA, Irena. Ecological Transformation in Bulgaria – New Challenges to the Businesses and the Government. European Journal of Economics and Business Studies, [S. l.], v. 4, n. 2, p. 20–32, 2018. DOI: 10.26417/ejes.v4i2.p22-34. Disponível em: https://revistia.com/index.php/ejes/article/view/2668. Acesso em: 30 nov. 2025.