OPSTAD, L. .; ÅRETHUN, T. . Choice of Courses in Mathematics at Upper-Secondary School and Attitudes towards Mathematics among Business Students: The Case of Norway. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 18, n. 7, p. 228–244, 2019. Disponível em: http://ijlter.net/index.php/ijlter/article/view/546. Acesso em: 24 jun. 2026.