АКМАЛДІНОВА, О.; ПИСЬМЕННА, О. Problems of reforming education systems. Proceedings of the National Aviation University. Series: Pedagogy, Psychology, [S. l.], v. 1, n. 3, p. 19, 2012. DOI: 10.18372/2411-264X.3.2133. Disponível em: https://jrnl.nau.edu.ua/index.php/VisnikPP/article/view/2133. Acesso em: 20 feb. 2026.