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International Journal of Project Management > 2017 > 35 > 6 > 1120-1132
International Journal of Project Management > 2011 > 29 > 8 > 1044-1056
IEEE Transactions on Engineering Management > 2010 > 57 > 2 > 198 - 210
International Journal of Project Management > 2009 > 27 > 5 > 464-470
IEEE Transactions on Engineering Management > 2008 > 55 > 3 > 434 - 441