@article {,
	title = {Early maize agriculture and interzonal interaction in southern Peru},
	journal = {Nature},
	volume = {440},
	number = {7080},
	year = {2006},
	pages = {76-79},
	author = {Perry, Linda and Sandweiss, Dan and Dolores R. Piperno, and Kurt Rademaker, and Malpass, Michael and Umire, Ad{\'a}n and Pablo de la Vera}
}