| Title | Publication Date | Language | Citations |
|---|---|---|---|
| When cognitive psychology met Japanese primatology | 2001/12/07 | English | 1 |
| The use of tokens as rewards and tools by chimpanzees (Pan troglodytes) | 2001/10/05 | English | |
| Cecilia Heyes and Ludwig Huber (eds): The Evolution of Cognition MIT Press, 2000, 396 pp, hardcover, ISBN 0-262-08286-1, US$ 52 | 2002/09/01 | English |