Reed, P., Smale, D., Owens, D., & Freegard, G. (2018). Human performance on random interval schedules. Journal of Experimental Psychology: Animal Learning and Cognition, 44(3), pp. 309-321. doi:10.1037/xan0000172

Reed, Phil, Demelza Smale, Dimitra Owens, and Gary Freegard. "Human Performance On Random Interval Schedules." Journal of Experimental Psychology: Animal Learning and Cognition 44, no. 3 (2018): 309-321.

Reed, Phil, Demelza Smale, Dimitra Owens, and Gary Freegard. "Human Performance On Random Interval Schedules." Journal of Experimental Psychology: Animal Learning and Cognition 44.3 (2018): 309-321.