CHRISTENSEN, R. .; KNEZEK, G. Comparative Measures of Grit, Tenacity and Perseverance. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 8, n. 1, p. 16–30, 2014. Disponível em: https://ijlter.net/index.php/ijlter/article/view/1153. Acesso em: 30 apr. 2026.