Mohammed Dhnoon Eidan and Mufeed D. Y. Almula-Dhanoon, “The Impact of Years of Schooling and Quality of Education on Economic Development: A Comparative Study Using Panel Data and the Generalized Method of Moments (GMM) Approach”, Tikrit J. Admin. Econ. Sci., vol. 22, no. 74 part 1, pp. 554–568, Jun. 2026.