Assistant Professor Zainab Jabbar Youssef, and Professor Dr. Suhail Abdullah Al-Tamimi. “THE INTERACTIVE EFFECT OF ENVIRONMENTAL UNCERTAINTY ON THE RELATIONSHIP BETWEEN HR 4.0 COSTS AND OPERATIONAL PERFORMANCE”. World Economics and Finance Bulletin, vol. 30, Jan. 2024, pp. 197-10, https://scholarexpress.net/index.php/wefb/article/view/3726.