Reed, P., Honey, R., & Hall, G. (1992). Analysis of potentiation and overshadowing effects in the instrumental performance of pigeons. Learning and Motivation, 23(4), pp. 368-382. doi:10.1016/0023-9690(92)90002-4

Reed, Phil, R.C Honey, and Geoffrey Hall. "Analysis of Potentiation and Overshadowing Effects in the Instrumental Performance of Pigeons." Learning and Motivation 23, no. 4 (1992): 368-382.

Reed, Phil, R.C Honey, and Geoffrey Hall. "Analysis of Potentiation and Overshadowing Effects in the Instrumental Performance of Pigeons." Learning and Motivation 23.4 (1992): 368-382.