Williams, D. C., Hayashi, Y., Brewer, A., Saunders, K. J., Fowler, S., & Pitts, R. C. (2019). Transitions from Rich-to-Lean Schedules Increase Attack in a Laboratory Model of Social Aggression in Pigeons: I. Fixed-Ratio Schedules. Mexican Journal of Behavior Analysis, 45(2). https://doi.org/10.5514/rmac.v45.i2.75580