@article {EllisRamankutty2000FEE,
	title = {{Putting people in the map: anthropogenic biomes of the world}},
	journal = {Frontiers in Ecology and the Environment},
	volume = {6},
	number = {8},
	year = {2000},
	pages = {439-447},
	author = {Ellis, E.C. and Ramankutty, N.}
}