IVERSEN, I. H. An Inexpensive Method to Study Response Variability in Acquisition and Extinction of Operant Behavior. Mexican Journal of Behavior Analysis, [S. l.], v. 43, n. 2, 2017. DOI: 10.5514/rmac.v43.i2.62314. Disponível em: https://revistas.unam.mx/index.php/rmac/article/view/62314. Acesso em: 2 may. 2024.