1. Species diversity in space and time;Rosenzweig,1995
2. Body size and metabolism;Kleiber;Hilgardia,1932
3. Human behaviour and the principle of least effort;Zipf,1949
4. Manuale di economia politica;Pareto,1906
5. Power laws, Pareto distributions and Zipf's law;Newman;Contemp Phys,2005