ILIEV, Ivaylo. DEPENDENCE ON DIGITAL DEVICES AT THE INDIVIDUAL LEVEL IN BULGARIA. KNOWLEDGE - International Journal , [S. l.], v. 56, n. 1, p. 115–121, 2023. Disponível em: https://ojs.ikm.mk/index.php/kij/article/view/5944. Acesso em: 24 jul. 2026.