Hernandez-Pozo, R., P. Harzem, M. Rossi, and G. Fernández Pardo. “Assessment of the ‘time-Urgency’ Behavioral Style: Performance under DRL Schedules of Reinforcement”. Mexican Journal of Behavior Analysis, vol. 16, no. 1, Jan. 2011, pp. 113-29, doi:10.5514/rmac.v16.i1.23363.