Collins, G. T., Witkin, J. M., Newman, A. H., Svensson, K. A., Grundt, P., Cao, J., & Woods, J. H. (2005). Dopamine Agonist-Induced Yawning in Rats: A Dopamine D3 Receptor-Mediated Behavior.

Collins, Gregory T., Jeffrey M. Witkin, Amy H. Newman, Kjell A. Svensson, Peter Grundt, Jianjing Cao, και James H. Woods. Dopamine Agonist-Induced Yawning in Rats: A Dopamine D3 Receptor-Mediated Behavior. 2005.

Collins, Gregory T., et al. Dopamine Agonist-Induced Yawning in Rats: A Dopamine D3 Receptor-Mediated Behavior. 2005.