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| web | Robert E. Ulanowicz | A Prosperous Way Down | 2015-02-04 |
| web | Robert J. Michaels | Institute for Energy Research | 2012-07-01 |
| web | Michael Shellenberger, Ted Nor... | Breakthrough Institute | 2011-02-17 |
| web | Michael Shellenberger, Ted Nor... | Breakthrough Institute | 2011-02-17 |
| web | David Owen | New Yorker | 2010-12-12 |
| web | John Bellamy Foster, Brett Cla... | Monthly Review | 2010-11-01 |
| web | | Yale Environment 360 | 2010-09-30 |
| web | David A. Fahrenthold | Washington Post | 2010-09-30 |
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| web | Blake Alcott | Ecological Economics | 2005-05-23 |