BACKHOFF, E.; LOVITT, T.; LAZARRAZOLO, N.; ROMANO, H. Acquisition, generalization and maintenance of addition, substraction and multiplication problems. Mexican Journal of Behavior Analysis, [S. l.], v. 6, n. 1, 2011. DOI: 10.5514/rmac.v6.i1.23679. Disponível em: https://revistas.unam.mx/index.php/rmac/article/view/23679. Acesso em: 6 may. 2024.