Books:

1. Rubenstein, D. I. (2001). Social behavior. Pp. 295-304. In: Encyclopedia of Biodiversity, Volume 5. S. A. Levin (ed.). Academic Press.
2. Dugatkin, L.A. (1997) Cooperation Among Animals: A Modern Perspective. Oxford University Press - Monographs in Ecology and Evolution.

Webliography:

1.  http://www.fishwild.vt.edu/faculty/karpanty/madagascar_research.html