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Author | Title | Year | Publication | Serial | Volume | Pages |
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Zentall, T.R.; Weaver, J.E.; Clement, T.S. | Pigeons group time intervals according to their relative duration | 2004 | Psychonomic bulletin & review | 231 | 11 | 113-117 |
Friedrich, A.M.; Clement, T.S.; Zentall, T.R. | Functional equivalence in pigeons involving a four-member class | 2004 | Behavioural processes | 228 | 67 | 395-403 |