1. Agrawal, A. (2002). Common resources and institutional stability. In E. Ostrom, T. Dietz, N. Dolsak, P. C. Stern, S. Stonich, & E. U. Weber (Eds.), The drama of the commons. Washington, DC: National Academy Press.
2. Alvard, M. S. (1998). Evolutionary ecology and resource conservation. Evolutionary Anthropology, 7, 62–74.
3. Anderies, J. M., & Janssen, M. A. (2013). Sustaining the commons. Tempe: Center for the Study of Institutional Diversity.
4. Barth, H. (1965). Travels and discoveries in North and Central Africa: Being a journal of an expedition undertaken under the auspices of H.B.M.’s government in the years 1849–1855 (Vols. I, II, and III). London: Frank Cass.
5. Bassett, T. J., & Turner, M. D. (2007). Sudden shift or migratory drift? Fulbe herd movements to the Sudano-Guinean region of West Africa. Human Ecology, 35(1), 33–49.