STADDON, J. E. R. Schedule Combinations and Choice: Experiment and Theory. Mexican Journal of Behavior Analysis, [S. l.], v. 21, n. 3, p. 163–274, 2011. DOI: 10.5514/rmac.v21.i1.ESP.25423. Disponível em: https://journals.unam.mx/index.php/rmac/article/view/25423. Acesso em: 24 jul. 2024.