ATTITUDES OF PARENTS TOWARD RECOMMENDED VACCINES IN BULGARIA. TRAKIA JOURNAL OF SCIENCES, [S. l.], v. 23, n. Supplement 1, p. 6, 2025. DOI: 10.15547/tjs.2025.s.01.013. Disponível em: https://tjs.trakia-uni.bg/index.php/tjs/article/view/152.. Acesso em: 21 jan. 2026.