AVILA S., R.; GALLARDO, L. M. Acquisition of lever pressing in rats under a intermittent schedule of delayed reinforcement. Mexican Journal of Behavior Analysis, [S. l.], v. 20, n. 2, p. 119–129, 2011. DOI: 10.5514/rmac.v20.i2.23546. Disponível em: https://revistas.unam.mx/index.php/rmac/article/view/23546. Acesso em: 6 may. 2024.