^ Olson, DM & E. Dinerstein (1998). The Global 200: A presentation approach to conserving the Earth's most biologically valuable ecoregions. Conservation Biol. 12:502–515, [1] Archived 2016-10-07 at the Wayback Machine .
^ Olson, DM, Dinerstein, E., Wikramanayake, ED, Burgess, ND, Powell, GVN, Underwood, EC, D'Amico, JA, Itoua, I., Strand, HE, Morrison, JC, Loucks, CJ, Allnutt, TF, Ricketts, TH, Kura, Y., Lamoreux, JF, Wettengel, WW, Hedao, P., Kassem, KR (2001). Terrestrial ecoregions of the world: a new map of life on Earth. Bioscience 51(11):933–938, [2] Archived 2012-09-17 at the Wayback Machine .