Rockstrom, Johan, Steffen, Will, Noone, Kevin, Persson, Asa, Chapin, F. Stuart III, Lambin, Eric, Lenton, Timothy M., Scheffer, Marten, Folke, Carl, Schellnhuber, Hans Joachim, Nykvist, Björn, de Wit, Cynthia A., Hughes, Terry, van der Leeuw, Sander, Rodhe, Henning, Sörlin, Sverker, Snyder, Peter K., Costanza, Robert, Svedin, Uno, Falkenmark, Malin, Karlberg, Louise, Corell, Robert W., Fabry, Victoria J., Hansen, James, Walker, Brian, Liverman, Diana, Richardson, Katherine, Crutzen, Paul, and Foley, Jonathan (2009) Planetary boundaries: exploring the safe operating space for humanity. Ecology and Society, 14 (2). pp. 1-33.

Rockstrom, Johan, Steffen, Will, Noone, Kevin, Persson, Asa, Chapin, F. Stuart III, Lambin, Eric F., Lenton, Timothy M., Scheffer, Marten, Folke, Carl, Schellnhuber, Hans Joachim, Nykvist, Björn, de Wit, Cynthia A., Hughes, Terry, van der Leeuw, Sander, Rodhe, Henning, Sörlin, Sverker, Snyder, Peter K., Costanza, Robert, Svedin, Uno, Falkenmark, Malin, Karlberg, Louise, Corell, Robert W., Fabry, Victoria J., Hansen, James, Walker, Brian, Liverman, Diana, Richardson, Katherine, Crutzen, Paul, and Foley, Jonathan A. (2009) A safe operating space for humanity. Nature, 461 (7263). pp. 472-475.