@article {2170,
	title = {Planetary Boundaries. Exploring the Safe Operating Space for Humanity},
	journal = {Ecology and Society},
	volume = {14},
	year = {2009},
	chapter = {article 32},
	author = {Rockstr{\"o}m, Johan and Steffen, Will and Noone, Kevin and Persson, {\r A}sa and Chapin, Stuart F. III and Lambin, Eric and Lenton, Timothy}
}
