Lesnikova М. V. Statistical Studies of Problems of the Development of Professional-Technical Education in Ukraine. Statistics of Ukraine, [S. l.], n. 4(79), p. 54–64, 2017. DOI: 10.31767/su.4(79).2017.04.07. Disponível em: https://su-journal.com.ua/index.php/journal/article/view/147. Acesso em: 28 jun. 2026.