Mohammed Rasheed Mustafa Suleiman and James Yohana Odeesh, “Role of Systems Thinking in Enhancing Human Resource Planning: An analytical study of the opinions of a sample of administrative leaders in governmental organizations in Duhok city”, Tikrit J. Admin. Econ. Sci., vol. 22, no. 74 part 2, pp. 304–329, Jun. 2026.