E.A., Boonzaier, Hoffman M.T., Archer F.M., and Smith A.B. “Communal Land Use and the ’tragedy of the commons’: Some Problems and Development Perspectives With Specific Reference to Semi-Arid Regions of Southern Africa”. African Journal of Range and Forage Science 7, no. 2 (February 1, 1990): 77–80. Accessed October 16, 2026. https://www.ajol.info/index.php/ajrfs/article/view/952.