CLAUDIO TODOROV, J., L. COUTO DE CARVALHO, and K. CARVALHO COUTO. “PAUSES IN MULTIPLE EXTINCTION FIXED-INTERVAL REINFORCEMENT SCHEDULES WITH FIXED DURATIONS OF THE EXTINCTION COMPONENT: IMPLICATIONS FOR TIMING”. Mexican Journal of Behavior Analysis, vol. 39, no. 1, June 2013, doi:10.5514/rmac.v39.i1.63908.