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Author  |
Title | Year | Publication | Serial | Volume | Pages |
|---|---|---|---|---|---|---|
| Potì, P.; Langer, J.; Savage-Rumbaugh, S.; Brakke, K.E. | Spontaneous logicomathematical constructions by chimpanzees (Pan troglodytes, P. paniscus) | 1999 | Animal Cognition | 3125 | 2 | 147-156 |
| Rumbaugh, D.M.; Savage-Rumbaugh, S.; Hegel, M.T. | Summation in the chimpanzee (Pan troglodytes) | 1987 | Journal of Experimental Psychology. Animal Behavior Processes | 2785 | 13 | 107-115 |