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Barry, Mike, Cashore, Ben, Clay, Jason, Fernandez, Michael, Lebel, Louis, Lyon, Tom, Mallet, Patrick, Matus, Kira J. M., Melchett, Peter, Vandenbergh, Michael, Vis, Jan Kees and Whelan, Tensie (2012) Toward sustainability: the roles and limits of certification. . Resolve, Washington, D.C..