AlbertRJeongHBarabasiA-L, 1999, “Diameter of the World-Wide Web”Nature401130–131
2.
HubermanB AAdamicL A, 1999, “Growth dynamics of the World-Wide Web”Nature401131
3.
MorrisonPMorrisonP, 1994Powers of Ten (Scientific American Library, New York)
4.
RichardsonL F, 1951, “The problem of contiguity”, in Collected Papers of Lewis Fry Richardson Ed. AshfordO M (Cambridge University Press, London) pp 611–612
5.
SalingarosN AWestB J, 1999, “A universal rule for the distribution of sizes”Environment and Planning B: Planning and Design26909–924
6.
WattsD JStrogatzS H, “Collective dynamics of ‘small world’ networks”Nature393440–442
7.
ZipfG K, 1949Human Behavior and the Principle of Least Effort (Addison-Wesley, Cambridge, MA)