Carpio, C., Pacheco, V., Gutiérrez, G., Hernández, R. and Ribes, E. 2011. Probability and availability of reinforcement in temporal schedules of different durations. Mexican Journal of Behavior Analysis. 15, 1y2 (Jan. 2011), 67–87. DOI:https://doi.org/10.5514/rmac.v15.i1y2.23469.