Cepeda, M. L., Hickman, H., Moreno, D., Peñalosa, E. and Ribes-Iñesta, E. (2011) “The effect of prior selection of verbal descriptions of stimulus relations upon the performance in conditional discrimination in human adults”, Mexican Journal of Behavior Analysis, 17(1-2), pp. 53–79. doi: 10.5514/rmac.v17.i1-2.22927.