Nguyễn . T. K. ’Dual system" as a Model for Products Satifying Social Needs. Journal of Technical Education Science, [S. l.], v. 5, n. 1, p. 19–23, 2010. Disponível em: https://www.jte.edu.vn/index.php/jte/article/view/833. Acesso em: 8 apr. 2026.