SARI, P.; DINDYAL, J.; SHUTLER, P. M. E. The ‘mound-hollow’ model for solving integer addition and subtraction problems. Journal on Mathematics Education, [S. l.], v. 16, n. 1, p. 365–382, 2025. DOI: 10.22342/jme.v16i1.pp365-382. Disponível em: http://jme.ejournal.unsri.ac.id/index.php/jme/article/view/3484. Acesso em: 31 mar. 2025.