HOGUE, M. D.; SPENGLER, M.; HUGHES, R.; BELL, C. Building a Foundational Understanding of Systems of Equations. Ohio Journal of School Mathematics, [S. l.], v. 94, n. 1, p. 21–30, 2023. Disponível em: https://ohiomathjournal.org/index.php/OJSM/article/view/9482. Acesso em: 27 sep. 2023.