داودفضيلة, and مازنشهباء. “The Role of Concurrent Engineering In Enhancing Strategic Performance :Applied Research in Zora Public Company”. Journal of Economics and Administrative Sciences 22, no. 88 (April 1, 2016): 181. Accessed December 1, 2019. http://jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/531.