Reed, P., Schachtman, T. R., & Hall, G. (1988). Overshadowing and potentiation of instrumental responding in rats as a function of the schedule of reinforcement. Learning and Motivation, 19(1), pp. 13-30. doi:10.1016/0023-9690(88)90023-9

Reed, Phil, Todd R. Schachtman, and Geoffrey Hall. "Overshadowing and Potentiation of Instrumental Responding in Rats As a Function of the Schedule of Reinforcement." Learning and Motivation 19, no. 1 (1988): 13-30.

Reed, Phil, Todd R. Schachtman, and Geoffrey Hall. "Overshadowing and Potentiation of Instrumental Responding in Rats As a Function of the Schedule of Reinforcement." Learning and Motivation 19.1 (1988): 13-30.