NIKOLOV, N.; PAVLOV, P. Theoretical concepts for building Smart cities. Annual of Natural Sciences Department, [S. l.], v. 7, p. 30–40, 2022. DOI: 10.33919/ansd.22.7.4. Disponível em: https://ojs.nbu.bg/index.php/ANSD/article/view/861. Acesso em: 21 may. 2024.