JEVTIĆ, Radoje B.; JANKOVIĆ, Ivana; LUKIĆ, Jelena. Adverse effects of modern communication technologies on the Serbian elementary and secondary school pupils in Niš region. Education and Research in Health Sciences, [S. l.], v. 3, n. 1-2, p. 47–65, 2025. DOI: 10.5937/erhs3-55349. Dostupno na: https://test.aseestant.ceon.rs/index.php/erhs/article/view/55349. Pristupljeno: 20 sep. 2026.