Eugen Hecht (2003)<br>[http://scitation.aip.org/journals/doc/PHTEAH-ft/vol_41/iss_8/486_1.html An Historico-Critical Account of Potential Energy: Is ''PE'' Really Real?]
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Nophea Sasaki, Toshiaki Owari and Francis E. Putz (2011)<br>[http://www.mdpi.com/1996-1073/4/7/1051/pdf Time To Substitute Bioenergy for Nuclear Power in Japan]'''<br>
Nophea Sasaki, Toshiaki Owari and Francis E. Putz (2011)<br>[http://www.mdpi.com/1996-1073/4/7/1051/pdf Time To Substitute Bioenergy for Nuclear Power in Japan]'''<br>'''
Geoffrey P. Hammond and Adrian B. Winnett (2009)<br>[http://www.mdpi.com/2071-1050/1/4/1195/pdf The Influence of Thermodynamic Ideas on Ecological Economics: An Interdisciplinary Critique]
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Dorion Sagan and Jessica Hope Whiteside (2004)(permission requested)<br>[[ http://www.ldeo.columbia.edu/~polsen/nbcp/sagan_whiteside_05_sm.pdf|Gradient Reduction Theory: Thermodynamics and the Purpose of Life]]
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