TRAN, T. .; NGUYEN, N.-G. .; BUI, M.-D. .; PHAN, A.-H. . Discovery Learning with the Help of the GeoGebra Dynamic Geometry Software . International Journal of Learning, Teaching and Educational Research, [S. l.], v. 7, n. 1, p. 44–57, 2014. Disponível em: http://www.ijlter.myres.net/index.php/ijlter/article/view/1170. Acesso em: 17 apr. 2026.