Coba jelasin Lihat pula dari Biomassa (ekologi) dong

Foley, JA; Monfreda, C; Ramankutty, N and Zaks, D (2007) Our share of the planetary pie Proceedings of the National Academy of Sciences of the USA, 104(31): 12585–12586. Download

Haberl, H; Erb, KH; Krausmann, F; Gaube, V; Bondeau, A; Plutzar, C; Gingrich, S; Lucht, W and Fischer-Kowalski, M (2007) Quantifying and mapping the human appropriation of net primary production in earth's terrestrial ecosystems Proceedings of the National Academy of Sciences of the USA, 104(31):12942-12947. Download

Purves, William K and Orians, Gordon H (2007) Life: The Science of Biology, 8th Ed. W. H. Freeman. ISBN 978-1-4292-0877-2