BORISOVA, Olga. BULGARIA’S HYBRID ENERGY MODEL: LEGAL ASPECTS OF SYSTEMIC SUSTAINABILITY. Proceedings of the International Conference on Secure Systems Design and Technology Development, [S. l.], v. 3, p. 363–369, 2026. DOI: 10.68302/std2026.vol3.24. Disponível em: https://journal.etrconf.eu/std/article/view/24. Acesso em: 27 sep. 2026.