web | Malcolm Ritter | Associated Press | 2006-05-03 | |
web | Tereza Pultarova | Space.com | 2023-07-28 | |
web | Pallab Ghosh | BBC | 2014-02-17 | |
web | Johan Rockstrom and others | Ecology and Society | 2009-01-01 | |
web | Andrew Bridges | Forbes | 2006-05-26 | |
web | Pallab Ghosh | BBC | 2014-02-17 |