TODOROV, J. C. Neglected operants in concurrent performance. Mexican Journal of Behavior Analysis, [S. l.], v. 5, n. 1, 2011. DOI: 10.5514/rmac.v5.i1.23661. Disponível em: https://revistas.unam.mx/index.php/rmac/article/view/23661. Acesso em: 9 may. 2024.