BIRYUKOV, Viktor. The importance of hierarchy and classification of sciences in the educational process. International Science Journal of Education & Linguistics, [S. l.], v. 4, n. 3, p. 11–19, 2025. DOI: 10.46299/j.isjel.20250403.02. Disponível em: https://isg-journal.com/isjel/article/view/1011. Acesso em: 7 jun. 2025.