Sultan WA, akaer Z shalal. Evaluating the efficiency of investments in insurance companies Analytical study in a sample of Qatari insurance companies. Tikrit J. Admin. Econ. Sci. [Internet]. 2021 Jun. 30 [cited 2026 Mar. 7];17(54, 1):244-63. Available from: https://www.tjaes.org/ojs/index.php/tjaes/article/view/1595