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Allen, D. T., and D. R. Shonnard. 2002. Green Engineering: Environmentally Conscious Design of Chemical Processes. Upper Saddle River, NJ: Prentice Hall.
Murphy, C., D. T. Allen, B. Allenby, J. Crittenden, C. Davidson, C. Hendrickson, and S. Matthews. 2009. “Sustainability in Engineering Education and Research at U.S. Universities.” Environmental Science & Technology 43:5558–64.