@article {keitt-2002a,
	title = {Scaling in the growth of geographically subdivided populations: invariant patterns from a continent-wide biological survey},
	journal = {Phil. Trans. R. Soc. Lond. B},
	volume = {357},
	year = {2002},
	pages = {627{\textendash}633},
	author = {Keitt, TH and Amaral, LAN and Buldyrev, S V and Stanley, HE}
}
