| web | John Michael Greer | Archdruid Report | 2014-04-10 | |
| web | Marc Lallanilla | LiveScience | 2014-03-18 | |
| web | Karl Tate | LiveScience | 2014-03-19 | |
| web | Wits University | ScienceDaily | 2013-11-04 | |
| web | Mary C. Scholes and Robert J. ... | Science | 2013-11-01 | |
| web | Robert Jensen | Dissident Voice | 2012-09-29 | |
| web | Richard Heinberg | Post Carbon Institute | 2012-02-16 | |
| web | 2012-02-01 |