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Author  |
Title | Year | Publication | Serial | Volume | Pages |
|---|---|---|---|---|---|---|
| Suda, C.; Call, J. | Piagetian conservation of discrete quantities in bonobos (Pan paniscus), chimpanzees (Pan troglodytes), and orangutans (Pongo pygmaeus) | 2005 | Animal Cognition | 2494 | 8 | 220-235 |
| Van Schaik, C. | Why are some animals so smart? | 2006 | Scientific American | 2830 | 294 | 64-71 |
| Vlamings, P.H.J.M.; Uher, J.; Call, J. | How the great apes (Pan troglodytes, Pongo pygmaeus, Pan paniscus, and Gorilla gorilla) perform on the reversed contingency task: the effects of food quantity and food visibility | 2006 | Journal of Experimental Psychology. Animal Behavior Processes | 2765 | 32 | 60-70 |
| Vonk, J. | Gorilla ( Gorilla gorilla gorilla) and orangutan ( Pongo abelii) understanding of first- and second-order relations | 2003 | Animal Cognition | 2578 | 6 | 77-86 |