Authors: Jason Hill; Stephen Polasky; Erik Nelson; David Tilman; Hong Huo; Lindsay Ludwig; James Neumann; Haochi Zheng; Diego Bonta Journal: Proc Natl Acad Sci U S A Date: 2009-02-02 Impact factor: 11.205
Authors: David Tilman; Robert Socolow; Jonathan A Foley; Jason Hill; Eric Larson; Lee Lynd; Stephen Pacala; John Reilly; Tim Searchinger; Chris Somerville; Robert Williams Journal: Science Date: 2009-07-17 Impact factor: 47.728