@article {5967,
	title = {Robust patterns in food web structure},
	journal = {Physical Review Letters},
	volume = {88},
	number = {22},
	year = {2002},
	note = {PDF},
	pages = {228102-1-228102-4 },
	keywords = {ecology, food webs, network},
	author = {Camacho, Juan and Guimerà, Roger and Amaral, Luís A. Nunes}
}
