Hurtt, G. C., Frolking, S., Fearon, M. G., Moore, III, B., Shevliakova, E., Malyshev, S., Pacala, S., Houghton, R. A. (2006). The underpinnings of land-use history: three centuries of global gridded land-use transitions, wood harvest activity, and resulting secondary lands, Global Change Biology, 1-22, 12