Y.  Cambefort, ?Chapter 9. Dung beetles in tropical savannas?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 156-178.

Y.  Cambefort and Walter, P., ?Dung beetles in tropical forests in Africa?, in Dung Beetle Ecology, I.  Hanksi and Cambefort, Y., Eds. Princeton, NJ: Princeton University Press, 1991.

B. M.  Doube, ?Dung beetles of southern Africa?, in Dung Beetle Ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 133-155.

I.  Hanski and Cambefort, Y., ?Chapter 18. Resource partitioning?, in Dung beetle ecology, I.  Hanski and Cambefort, Y., Eds. Princeton: Princeton University Press, 1991, pp. 330-349.