Buskist, W., Morgan, D., Morgan, D., Terrell, D. J., Morgan, D., Terrell, D. J. and Terrell, D. J. (2011) “On the experimental analysis of human behavior”, Mexican Journal of Behavior Analysis, 11(1 y 2), pp. 69–78. doi: 10.5514/rmac.v11.i1 y 2.25771.