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IEEE Transactions on Engineering Management > 2012 > 59 > 4 > 644 - 653
IEEE Transactions on Engineering Management > 2012 > 59 > 4 > 530 - 539
IEEE Transactions on Engineering Management > 2012 > 59 > 4 > 572 - 584
IEEE Transactions on Engineering Management > 2010 > 57 > 2 > 168 - 180