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| 2000 | ||
|---|---|---|
| 1 | EE | Evelien P. H. Zeggelink, Henk de Vos, Donald Elsas: Reciprocal altruism and group formation: The degree of segmentation of reciprocal altruists who prefer 'old-helping-partners'. J. Artificial Societies and Social Simulation 3(3): (2000) |
| 1 | Donald Elsas | [1] |
| 2 | Henk de Vos | [1] |