Pervasive density-dependent recruitment enhances seedling diversity in a tropical forest. Givnish, T.J. 1999. On the causes of gradients in tropical tree diversity. Bridget Stevens, G. C. 1989. Lewin, R. 1989.
Biologists disagree over bold signature of nature.
Stephanie Pagel, M. D., R. M. May, and A. R. Collie. Ecological aspects of the geographical distribution and diversity of mammalian species. Bill Colwell, R. K., and G. C. Hurtt. Nonbiological gradients in species richness and a spurious Rapoport effect. Becky Rohde, K., M. Heap, and D. Heap. 1993.