HAVIAR, Miroslav; GUFFOVÁ, Daniela; SISÁKOVÁ-CHOVANOVÁ, Andrea. 21st Century Skills In Educational Standards For Lower Secondary Education In Slovakia . Norma, [S. l.], v. 27, n. 1, p. 9–18, 2022. DOI: 10.5937/norma27-36344. Dostupno na: https://asistent.ceon.rs/index.php/norma/article/view/36344. Pristupljeno: 12 jul. 2026.