Garcia, A., Pérez González, F., Martín Vera, R., Gutiérrez Domínguez, M., Gómez Bujedo, J., Pérez Fernández, V. and Benjumea Rodriguez, S. (2011) “Effect of age and type of reinforcer in the equivalence – equivalence by a partition procedure”, International Journal of Psychological Research, 4(1), pp. 7–15. doi: 10.21500/20112084.788.