XU, Aiping; LENTON, George. Understanding of fraction and its application in unit conversions. MSOR Connections, [S. l.], v. 16, n. 1, p. 53–63, 2017. DOI: 10.21100/msor.v16i1.425. Disponível em: https://journals.gre.ac.uk/index.php/msor/article/view/425. Acesso em: 20 oct. 2025.