| Pert, A., & Gonzalez, R. C. (1974). Behavior of the turtle (chrysemys picta picta) in simultaneous, successive, and behavioral contrast situations. Journal of Comparative and Physiological Psychology, 87(3), 526–538. |
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| Added by: Sarina Wunderlich 01 Jan 2009 23:10:41 UTC |
Pop. 2%
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| Pert, A., & Bitterman, M. E. (1969). A technique for the study of consummatory behavior and instrumental learning in the turtle. American Psychologist, 24(3), 258–261. |
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| Added by: Admin 13 Sep 2009 10:11:20 UTC |
Pop. 2.75%
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| Pert, A., & Bitterman, M. E. (1970). Reward and learning in the turtle. Learning and Motivation, 1(1), 121–128. |
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| Added by: Sarina Wunderlich 25 Jun 2011 12:41:54 UTC |
Pop. 2.5%
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