International Journal of Project Management
International Journal of Project Management > 2008 > 26 > 1 > 80-86
International Journal of Project Management > 2012 > 30 > 4 > 418-431
International Journal of Project Management > 2015 > 33 > 3 > 623-637
International Journal of Project Management > 2015 > 33 > 5 > 1052-1067