SULEV, G. Transition from asymmetric to symmetric regulation of competition in the electronic communications sector in Bulgaria. Yearbook Telecommunications, [S. l.], v. 8, p. 1–12, 2021. DOI: 10.33919/YTelecomm.21.8.1. Disponível em: https://ojs.nbu.bg/index.php/YT/article/view/594. Acesso em: 1 oct. 2022.